EDUCATION CONNECTION Teaching General Entomology to Disinterested Undergraduates David Rivers T eaching general entomology at an institution like Loyola College, where undergraduate education is of prime importance, is very rewarding, but it can also be incredibly challenging. Like most private and many public liberal arts schools, students intent on a biology major usually arrive on campus with the desire to pursue a health career, more specifically, the ambition of becoming a “doctor.” Consequently, these students choose a curricular path that is focused on “premedical” courses, with a keen interest in any course containing “human” in the title. Curricular requirements imposed by the department (we encourage breadth of knowledge and skills) that deviate from this narrow route tend to be viewed by many (not all) students as pointless, if not worthless. Thus, most students grudgingly complete the requirements for the biology major, with their least desirable courses coming from the Population Biology sector. This just so happens to be where my General Entomology course is housed. In fact, all upper-level courses that are commonly referred to as survey courses (that is, courses that emphasize the morphology, taxonomy, life cycles, and natural histories of whole organisms) have been lumped together in the Population category. An alarming trend is sweeping through biology programs across the nation: these survey courses, those particularly focused on plants and invertebrate animals, are disappearing. They are disappearing from biology curricula because students are avoiding such courses, largely out of lack of interest in the topics and because many students believe that the content is not relevant to their career paths. In response, biology 24 programs are forced to drop the courses due to low enrollments, and many departments have elected to stop offering such courses altogether, citing a variety of reasons (Wilcove and Eisner 2000). The result is that it is now possible for many students across the nation to obtain an undergraduate biology degree with only minimal or no exposure to the biology of the plants and animals that dominate the planet. An understanding and appreciation of natural history is being lost from a whole generation, and there is no indication that the problem is being resolved (Wilcove and Eisner 2000). Using my undergraduate general entomology course, I describe my approaches to addressing and overcoming these pedagogical problems. My solution has been to design an integrated course that combines some elements of a traditional introductory entomology course with a variety of nontraditional and hands-on experiences. The result, I believe, is a course that students thoroughly enjoy, leading to increased motivation to learn and understand the concepts of insect biology specifically, and, more broadly, natural history. component was set up for study of the morphology and taxonomy of insects, and field trips were used as an opportunity to develop an insect collection. Over the past 3 years, I have introduced short (1- or 2-wk long) inquiry-based activities to examine such topics as feeding behavior, limb regeneration, and reproductive strategies. Typically, students majoring in biology enroll in the General Entomology course during their sophomore or junior year. The course was designed for upper-level students who have a significant background in biological principles (usually two years worth of courses) and have finished a two-semester biology sequence on experimental design and analysis. Most of the students plan to attend medical school or obtain graduate training upon graduation. Consequently, the course is filled with very bright, highly motivated students. Despite these attributes, however, most students enroll in the course because of the instructor’s reputation or personality or because they were closed out of their initial course choices during registration, and not because they have a genuine interest in the topics or techniques of entomology. Teaching Methods General entomology at Loyola College is a one-semester course that was originally designed to provide undergraduate students an introduction to the morphology, classification, life cycles, behavior, and ecology of insects, with special reference given to the more common species that affect humans. Lectures have been traditional (e.g., teacher-centered, didactic), with an emphasis placed on phylogeny and the biology of the most common insect orders. The laboratory The Curricular Problem Generally speaking, biology students at institutions, such as Loyola College, lack an interest in survey courses and, to a lesser extent, field-oriented classes. This disinterest may have a specific origin with reference to invertebrates: students initially avoid the entomology course at Loyola because they are “grossed out” or annoyed by insects, and/or they are “scared to death” of spiders and insects that bite or sting. (Spiders are cited most often, usually by individuals who do American Entomologist • Spring 2006 not know that there is a difference between a “spider” and an “insect.”) These comments stem from conversations with my students over the past 10 years. Among the undergraduates who have made these statements, almost all have indicated that they were raised in an urban environment and spent minimal time outdoors, excluding sporting and exercise activities. There are exceptions, of course, to these observations, particularly in departments that offer an environmental science or ecology program. Nonetheless, the impact of disinterested students on shaping the curricula of science programs can and has been profound (National Science Foundation 1998, Rothman and Narum 1999, Wilcove and Eisner 2000). Thus, Loyola College is not alone in facing the problems with survey courses. Perpetuating the issues associated with student disinterest is the fact these courses have changed very little in terms of pedagogical approaches in the classroom. Most introductory or general entomology courses are good examples of the pedagogical problems associated with whole-organism, survey courses. The lectures and laboratories (including field experiences) have focused on the traditional content-driven topics of morphology, taxonomy, and life cycles. Active learning approaches in the classroom have been rare in these courses at most institutions. In fact, this is perhaps the most important aspect to recognize with the curricular deficiency: educational reform has swept through biology programs in the United States, but not all subdisciplines in the life sciences have participated. Active learning approaches have been introduced to supplant or augment passive techniques (National Science Foundation 1996, McNeal and D’Avanzo 1997). Integrating lecture and laboratory experiences has been encouraged, rather than using laboratories to merely reinforce lecture ideas and facts, or to perform “cookbook” exercises (National Research Council 1996, 1998). Courses in areas such as physiology and molecular biology, and even introductory biology classes, have seen most of the pedagogical changes (Rothman and Narum 1999, Conference Report 2001). Field and survey courses are just now being considered. This represents not only a considerable deficit in any program’s ability to provide a thorough education to students in the fields of organismal and population biology, but it also means that such courses are not likely to pique students’ interest and curiosity. Perhaps it is most devastating to realize that general entomology courses have remained teacher-centered, predominantly using didactic lecture styles that are content-driven and focusing on topics known to not engage American Entomologist • Volume 52, Number 1 many undergraduate students, which may be contributing to our students’ lack of interest and appreciation of the natural history of all organisms. In my opinion, a response from our discipline is required to address the changing face of undergraduate science education. For me, I chose to abandon the approaches used when I was a student and develop an integrated course that gives priority to elevating student intellectual interest, motivation, and curiosity toward insect biology and natural history. The Solution? Higher science education at colleges and universities across the nation has undergone a revolution over the past decade. Faculty in science, math, engineering, and technology courses have been changing the way they teach, and student behaviors and attitudes toward science are driving the reform (National Science Foundation 1996, Rothman and Narum 1999). A common theme being Other than bee pollination, these students typically cannot name any positive influences that insects have on the human condition. brought to science courses is that active approaches to learning, such as inquiry and team problem-solving, are central not only to the process of science, but also to the learning of science (Rothman and Narum 1999, National Research Council 2000). Most educators agree that the science classroom, whether it be a lecture, laboratory, or field setting, should promote positive student attitudes including curiosity and interest, independent thinking, and basic and integrated process skills (Leonard 1983, McNeal and D’Avanzo 1997). In short, students need and want the opportunity to be engaged and active in their learning (National Science Foundation 1998, National Research Council 2000): to do science rather than just learn about science. To achieve such needed, yet ambitious goals, changes in how science is taught and what is taught in science classes must occur at all levels in a curriculum, from the introductory principles or foundations courses through the more narrowly focused upper-level courses. The “classroom” must be integrated, where distinctions between lecture and laboratory are blurred, and learning becomes student-active and no longer teacher-centered. Science education reform is in motion; and continued changes are not only still needed, but are being mandated from private and government agencies, as well as from industry and educational institutions (National Research Council 1996; National Science Foundation 1996, 1998; Rothman and Narum 1999). Nowhere is the need for science education reform better illustrated than in the survey courses. Most biology majors at undergraduate institutions avoid these courses, regardless of whether their preconceptions of entomology and other disciplines are correct or not, and many remain disinterested during and after the course. Has anyone even considered this issue when evaluating enrollments in graduate entomology programs or the declining membership of ESA? My guess is probably not. Traditional approaches alone are no longer working in the entomology classroom for most undergraduate students; change is needed. So what can been done? Instructors of general entomology courses need to identify students’ attitudes about insects, for example, and then develop course topics in a manner that makes connections with these attitudes. I use traditional and nontraditional topics, exercises, and handson experiences in my course at Loyola College as a means to make connections with student interests and maintain integrity of content (Table 1). I take into account that for most students (and the public at large), insects are identified as creatures that buzz around at picnics, landing on food or taking a plunge into cans of soda; that destroy our food by attacking crops or invading a kitchen pantry; and that vector many devastating diseases to humans, pets, and livestock. Other than bee pollination, these students typically cannot name any positive influences that insects have on the human condition. The take-home message is that the instructor must perhaps work harder in these courses than in others to develop topics or teaching approaches to reach students who generally do not have an interest in insects. To have vocational relevance to students with interests predominantly centered on health careers, I have also incorporated a number of activities focused on developing learning and technical skills associated with any career in biology (Table 2). My goal is to help students acquire skills that will help them mature as biologists and adults, and that are useful in their continued education at Loyola and beyond and that will help prepare them for their chosen careers. 25 Table 1. Traditional and Nontraditional Topics or Approaches Used in General Entomology at Loyola College Classification Approach or topic (traditional vs. nontraditional) Examination of internal and external morphology through dissections Field trips for insect collecting Traditional Traditional Term paper on insects shaping the human condition/civilizations Nontraditional Forensic entomology: simulation of crime scene investigation Nontraditional Student teaching: insect behavior lectures and demonstrations Nontraditional Insect reproductive biology and strategies: discussions and demonstrations Both Cockroach journal: students raise a hissing cockroach in dorm room and maintain daily journal Nontraditional Cockroach races: students investigate insect locomotion independently and then race cockroaches on last day of class (Madagascar Madness: Running of the Roaches) Nontraditional Insect pest case studies Nontraditional Electronic field guides: students develop Web-based field guides targeting elementary and middle school audiences Nontraditional Natural history project: includes small insect collections and use of 10 specimens as center-piece of a natural history story Nontraditional Other topics are addressed throughout the semester, but the above list includes the activities or topics that seem to be most successful in engaging students. The syllabus is not rigid. The topics that can be explored are endless, and I encourage the students to make suggestions throughout the semester on topics or ideas that they want to discuss. With different student attitudes and suggestions each term, the course is not always the same from one year to the next. Obviously, the instructor must be flexible to accommodate this approach to the classroom, but the benefits are well worth it. Topics introduced by or from students give them the opportunity to own the course and their own education. This ownership promotes greater connection to other topics through increased motivation, a feature that is essential to learning. What are the educational approaches that can be used to develop the essential learning skills for biology and for entomology specifically? The course does not have a formal laboratory period. Rather, each topic is presented in the most appropriate setting, whether that is a classroom for a traditional lecture, a seminar room for a student-led discussion, or a laboratory or field for hands-on experiences. The classroom is integrated with the topic or skill to be developed. For some of the basic material about insect biology (i.e., body plans and morphology), I use didactic (traditional) lectures and hands-on experiences. For example, 2–3 class meetings are dedicated to examining a variety of insects with generalized and specialized body plans and dissecting fresh specimens. As the class performs such techniques, I have the chance to discuss the internal and external anatomy 26 of these insect groups, and to discuss the ethical use of animals in dissections and experiments. I do not use separate lectures on such topics. Using this approach, students can see and touch while reading and hearing about body plans, morphology, and so forth, and ultimately place ideas, terms, and concepts in a tangible biological context. Students also have the chance to explore topics of interest independently and in small groups; they then present the information to the class in formats used by professional biologists. For example, as a mechanism to explore insect behavior in unique ways, students work as pairs to select a series of related behaviors to study over a relatively short time (2–3 wk). Live insects are either collected or ordered so that the students can observe the behaviors, then develop a brief lecture and hands-on demonstration for the class. As a part of this peer education, students write exam questions to evaluate their classmates’ understanding of the presented material. This activity alone has elevated student ownership for the course. In another exercise, each student works independently to investigate an insect pest problem associated with agriculture, livestock, human disease, building structure, urban settings, or simply nuisance pests, and to outline potential solutions. In this project, students may visit local areas or facilities that must confront insect pests, and they interview members of the community who deal with and/or solve the insect pest problems. They may also talk with research scientists working in basic and applied research geared toward pest management. This endeavor requires the students to critically evaluate the problem; research the literature to understand the insect, the damage inflicted, and the types of control measures that have been used; assess what has worked and what has not; and attempt to learn why they have not worked. Each student is asked to develop fresh insight into possible new approaches that achieve the desired outcome of pest control. The project is also amenable to a small-group effort, but I have not tried it in this format. Table 2. Educational Objectives of General Entomology Course at Loyola College. After the completion of the course, each student will be able I. To describe and define what an “insect” is and explain as well as diagram the insect and arthropod body plan; II. To understand the ecological roles of insects in different ecosystems; III. To develop and use independent and critical thinking skills, particularly in a contextual situation; IV. To develop and improve observation skills; V. To work cooperatively with large or small groups of students to complete projects; VI. To define biological diversity and natural history and develop an appreciation of insects in relation to humankind; VII. To explain the global impact of insects on human existence based on disease transmission and agricultural losses; VIII. To collect and identify insects for study using a range of aquatic, aerial and terrestrial field collecting techniques; IX. To preserve specimens for museum study; X. To develop and improve writing skills for scientific communication; and will XI. Be more interested and curious about insects and natural history. Assessment measures used in the course are designed to evaluate the development of desired learning skills or outcomes. American Entomologist • Spring 2006 As a final initiative, students individually collect and identify 20 insect specimens from the local region. (I know, the size of the insect collection should lead to me being flogged by respectable entomologists everywhere!) In fact, as the semester progresses, the class participates in field excursions to learn collecting techniques and identification skills. The next step is for each student to select 10 of these collected specimens for telling a natural history story (see the sidebar for details). The story to be told is entirely up to the students. It is to be written in intriguing prose, lacking the technical jargon of a scientific paper; it can be nonfiction or fiction. However, the story must use natural history features of the As presented in more detail in the side bar, the introduction of natural history projects to supplant the traditional insect collection has increased student motivation throughout the semester, and within the past 2 years, more students are enrolling out of interest. insects and clearly link the animals together. An example of such relationships could occur if, in telling the story of the little bunny that “couldn’t,” it dies and becomes a feast for many. Student creativity is encouraged with their stories, and one hopes that their fascination with the selected insects is obvious in the story. Intermixed among these activities, as well as others described in Table 1, are discussions of the role of insects in different ecosystems, and the impact, both good and bad, of insects on the human condition. Laboratory and field activities are incorporated throughout the term to allow examination of insect physiology, ecology, and behavior, including a unique forensic experience. Ultimately, I try to achieve a balance between topics of interest to the students and to me, with information that I believe must be included in an introductory entomology course, and at the same time incorporate activities and experiences that develop and enhance specific learning and technical skills. American Entomologist • Volume 52, Number 1 Evaluation and Discussion I believe the resulting integrated course works (at least within the environment at Loyola College) very well to attract students who otherwise are disinterested in insects, and it keeps students interested and motivated throughout the semester. How can I make this claim? Or at least, how have I evaluated the effectiveness of the integrated entomology course compared with a more traditional approach? It is important to understand that the design of my general entomology course, the topics selected, learning approaches adopted, and even my attitude toward teaching the course reflect an evolutionary process. I did not start 11 years ago teaching entomology this way. Not even close! And I do not suggest that any instructor reading my ideas adopt my syllabus or philosophy verbatim. The ideas may serve as a template that should be modified based at the very least on the students, the instructor’s strengths and interests, and the educational mission of the course and department. I have changed all aspects of the course, with major overhauls at times, and more recently, just minor tinkering. The basis for most change has come from informal assessment via conversations (interviews) with students before, during, and after the course (Smith and Southerland 2002). This is a continuous process that must take place each time I offer the course. Nothing is earth-shaking in the method, but it does represent a radical departure from my predecessor at Loyola. Francis (Hank) Giles, then an emeritus faculty member, informed me during my job interview that my chances of being successful teaching entomology were slim. In his words, “students at Loyola are too damn dumb to take entomology.” I think Hank’s words spoke more of frustration then genuine assessment, as his last seven attempts to offer the course went without a single student enrolling. Did this reflect on Hank? In part, perhaps, but more so, it represented the changing interests of students who major in life sciences—the attitudes that form today’s disinterest in survey courses. Perhaps one vehicle for assessing the integrated entomology course is to compare enrollment trends with the more traditional curriculum that Hank used. By this measure, the current entomology course is doing well, with average enrollments of 12 (from 11 years of enrollments) for a course capped at 18 per semester. However, in fairness to the traditional course before me, the number of biology majors in my department tripled from 1981 to 1995, while the number of fulltime faculty grew by only one (me). So the increased enrollments can also be attributed to growth of the major, with only a modest corresponding increase in course offerings. Likewise, entomology course enrollments have fluctuated widely over the last 5 years, from a low of 5 to a peak of 24 (the cap was raised). These variations most certainly are independent of the pedagogy used in general entomology. The most substantial change I have seen among students completing the integrated entomology course is associated with interest and motivation during the course. As presented in more detail in the side bar, the introduction of natural history projects to supplant the traditional insect collection has increased student motivation throughout the semester, and within the past 2 years, more students are enrolling out of interest. I believe that reducing the size of the insect collection has been a key motivator leading to the changes. A second course Natural History Projects Most of the students that enroll in my course have never collected or identified any type of creature. In fact, because most of the students are from predominantly urban environments, the idea of working in the field is not only foreign, but almost repulsive (not to mention that they are all afraid of contracting Lyme disease). From many informal interviews that I have had with present and past students, the idea of putting together a large insect collection with the subsequent pinning and identification is viewed with such dismay that potential students avoid my general entomology course. Even when other course activities intrigue them, the insect collection is a powerful repellent. feature that has attracted student interest is hissing cockroach drag racing. Although a clear educational purpose (independent investigation of insect locomotion) is associated with the annual event (known as Madagascar Madness), this has become the most memorable course experience for the students, and it shows them first hand that science can be fun (it could be profitable too, if ESPN would ever do live race coverage!). More importantly, students have begun to take ownership of the course through at least two activities: the student-led behavior discussions (including lectures, demonstrations, and generation of exam questions) and my willingness to modify course syllabus 27 based on students’ suggestions and recommendations during the term. Other exercises and experiences can and have had a similar effect on some students, but these two are cited more than any others by students at the semester’s end. Course grades have not been a reliable measure of the integrated entomology course, for two reasons. First, most students do well (the course average is usually a B on a 4.0 scale) in this course under any configuration. In fact, the only time that students have earned a final grade below a C+ is when they have done a poor job with the insect collection, which, in the past, carried the same weight as a regular exam. Second, because the course is never the same from one year to the next, it is difficult to make comparisons. No exams or papers from when the course Now is the time to change the focus and open discussion on how to reach students who have become increasingly disinterested in insects and natural history. was designed more traditionally are available to make comparisons; and even if they did, an additional variable (a different instructor) must be considered. Despite these inadequacies for making comparisons, it is generally accepted that if the course increases student interest and motivation, then learning is more likely to occur (McNeal and D’Avanzo 1997), which of course is a desired outcome from integrated general entomology. Subsequently, grades will reflect the increased learning. Has everything tried in the course worked? No, although in most cases, simply tinkering with small aspects of the approach corrected the problems. One example with which tinkering did not help was an activity known as electronic field guides. Instead of developing traditional insect collections, students were to make digital collections, convert the images to JPEG files, and then use the images to create a Web-based field guide. The targeted audience was elementary and middle school students and teachers. When discussing the projects with teachers in the Baltimore area, most expressed no interest in using the field guides, and all indicated that they lacked class time to devote to any aspect of 28 the project (my students were to work with the teachers and students in using the field guides). During the two years the electronic field guides were attempted, the students in the course generally lost interest once it became apparent that local schools would not be involved. Despite these problems, I am still intrigued by the concept. So does this type of curriculum work for an introductory or general entomology course? Yes, if the instructor is committed to making connections with students and remains flexible in approaches and pedagogy used in the classroom. This course design is merely a template for others and a means to initiate dialogue about teaching with and about insects. As mentioned earlier, a revolution has occurred in the way science is being taught at the undergraduate level, but not all disciplines have participated equally. The field of entomology and members of ESA have always been leaders in science education, but K–12 or graduate education is usually targeted. The undergraduate courses, ones I argue are the foundation of the entire discipline, never seem to receive much attention. Now is the time to change the focus and open discussion on how to reach students who have become increasingly disinterested in insects and natural history. My response has been to adapt the collections to highlight the original intent: a project that emphasizes natural history. Insect collections in my class have become greatly truncated in comparison with any other course; and they are used to develop a natural history story, fiction or nonfiction, by tapping into the nontechnical writing skills that most of my students already have. In those projects, students individually collect and identify 20 insect specimens, then select 10 of these collected specimens for telling a natural history story. The story to be told is entirely up to the students, but I encourage the class to approach the project like Stoke’s Observation Guides (e.g., Stokes Guide to Observing Insects 1984) or along the lines of Gilbert Waldbauer’s Insects through the Seasons (1996). The goal is for the students to use engaging prose, lacking the technical jargon of a scientific paper, to show the links among the selected critters by describing how they interact, commonalties in life history strategies, or other natural history features of the insects that clearly link the animals together. In all cases thus far, students have elected to develop humorous, fictional stories (but with real biology and natural histories) in the same vein as Gary Larson’s There’s a Hair in My Dirt!: A Worm’s Story. (1998). Student interest and motivation has definitely gone up with this approach, and the quality of their work in terms of writing reflects this increased motivation. References Cited Conference Report. 2001. International workshop: modern approaches to teaching and learning physiology. Adv. Physiol. Ed. 25(1): 64–71. Larson, G. 1998. There’s a hair in my dirt!: A worm’s story. Harper Collins, New York. Leonard, W. H. 1983. An experimental study of a BSCS-style laboratory approach for university general biology. J. Res. Sci. Teach. 20: 807-813. McNeal, A. P., and C. D’Avanzo. 1997. Studentactive science: models of innovation in college science teaching. Saunders College Publishing, Fort Worth, TX. National Research Council. 1996. From analysis to action: undergraduate education in science, mathematics, engineering, and technology. Report of a Convocation. Center for Science, Mathematics, and Engineering Education. National Research Council, Washington, DC. National Research Council. 2000. Inquiry and the National Education Science Standards: A guide for teaching and learning. National Academy Press, Washington, DC. National Science Foundation. 1996. Shaping the future: new expectations for undergraduate education in Science, Mathematics, Engineering, and Technology. NSF-96-139. http://www. her.nsf.gov.her/due/documents/review. National Science Foundation. 1998. Findings from the focus groups conducted during the review of undergraduate SME & T education. In: Shaping the future II: Perspectives on undergraduate education in Science, mathematics, Engineering and Technology. NSF-98-128. http://www.her.nsf.gov.her/due/ documents/review. Rothman, F. G., and J. L. Narum. 1999. Then, now & in the next decade: A commentary on strengthening undergraduate Science, Mathematics, Engineering and Technology Education. Project Kaleidoscope, Washington, DC. Smith, M. U., and S. A. Southerland. 2002. Classroom assessment techniques: interviews. http://www.flaguide.org/cat/interviews. Stokes, D., and L. Stokes. 1984. Stokes guide to observing insects. Little, Brown, Boston. Waldbauer, G. 1996. Insects through the seasons. Harvard University Press, Cambridge, MA. Wilcove, D., and T. Eisner. 2000. The extinction of natural history. Chronicle Higher Ed. Sep 14: 1324. David Rivers is the chair of the Biology Department and has taught General Entomology at Loyola College for the past 12 years. He has also mentored over 75 undergraduate students in research aimed at deciphering the mode of action of parasitic wasp venoms. American Entomologist • Spring 2006