Name: Andrea Sisk
Date: January 20, 2015
WOODLAND HILLS SECONDARY
LESSON PLANS
Content Area: Geometry
Length of Lesson: 10 days
STAGE I – DESIRED RESULTS
Lesson Topic (Modules, if applicable):
Proportions and Similarity
Big Ideas:
 CC.2.3.HS.A.5 Create justifications based
on transformations to establish similarity
of plane figures.
 CC.2.3.HS.A.6 Verify and apply theorems
involving similarity as they relate to plane
figures.
Understanding Goals (Concepts):
How ratios and proportions apply to similar
figures.
How scale factor is used in solving of proportions.
Recognize and use proportional parts and
relationships to solve problems with similar
triangles and parallel lines. .
Student Objectives (Competencies/Outcomes):
1. Write ratios. Use properties of proportions.
2. Identify similar figures. Solve problems involving
scale factors.
3. Identify similar triangles. Use similar triangles to
solve problems.
4. Use proportional parts of triangles. Divide a
segment into parts.
5. Recognize and use proportional relationships of
corresponding perimeters of similar triangles.
6. Recognize and use proportional relationships of
corresponding angle bisectors, altitudes, and
medians of similar triangles.
Essential Questions:
Can you…
 Identify similar polygons?
 Set up and use ratios and proportions to
solve problems with polygons?
 Recognize and use proportional parts
including perimeters, altitudes, angle
bisectors, and medians of similar triangles?
Vocabulary:
Ratio, proportion, means – extremes (cross
products), similar polygons, scale factor, midsegment, iteration, fractal, self-similar
STAGE II – ASSESSMENT EVIDENCE
Performance Task:
Formative Assessments:
Students will actively participate in mini-lessons, guided and independent
Pre-assessments, open-ended higher-order-thinking questions, think-pairpractice, activities (including authentic problem-solving tasks and vocabulary),
share, graphic organizers, do nows, observation of guided and independent
and group work. Also, students will demonstrate adequate understanding via
practice, brief in-class writing prompts
various quizzes, a writing assignment, and an end-of-chapter test.
Materials and Resources:
Textbook and notes
STAGE III – LEARNING PLAN
Interventions:
Flexible grouping, students will be encouraged to attend Math Lab and College
and Career Access Center tutoring.
Assignments
Procedures
Instructional Procedures*:
Monday
Date: 1/19
Day:
Tuesday
Date: 1/20
Day: B
 “Do Now”- Students will
solve multi step
algebraic equations.
 “Mini Lesson” –
Proportions-6.1 Day 1
 “Guided Practice” –
Write ratios and use
properties of
proportions.
 “Independent Practice”
Students will write
ratios, find extended
ratios in triangles, solve
proportions by using
cross product, and solve
problems using
proportions.
 “Formative Assessment”
- Observe students
during “Do Now”,
“Guided Practice” and
“Independent Practice”
Wednesday
Date: 1/21
Day: A
 “Do Now” – Collins Type
1 Writing: In 4 lines
describe how ratios and
proportions can be use
in everyday situations.
 “Mini Lesson” – Similar
Polygons- 6.2 Day 1
 “Guided Practice” –
Identify similar figures
and solve problems
involving scale factors.
 “Independent Practice”
– Students will
determine the similarity
of polygons, find the
scale factor using real
life situations, write
similarity statements,
and find the scale factor
between polygons.
 “Formative Assessment”
- Observe students
during “Do Now”,
“Guided Practice” and
“Independent Practice”
(6-1) Proportions. Page
285 – 286 # 12 – 22, 25,
28 – 34 even
(6-2) Similar Polygons
Page 293 – 294 # 11 –
20, 27 – 33, 34 – 38 even
Thursday
Date: 1/22
Day: B
 “Do Now” – Students
will identify similar
figures and solve
proportions.
 “Mini Lesson” – Similar
Triangles – 6.3 Day 1
 “Guided Practice” –
Identify similar triangles
and use similar triangles
to solve problems.
 “Independent Practice”
– Students will
determine whether
triangles are similar, find
missing parts of similar
triangles, and find
measurements of real
life examples.
 “Formative Assessment”
- Observe students
during “Do Now”,
“Guided Practice” and
“Independent Practice”
(6-3) Similar Triangles –
Day 1 Page 301 # 10 –
21, 41, 42
*Include Do Now, Mini Lesson, Guided Practice, Independent Practice, Summations/Formative Assessments, Reflections
Friday
Date: 1/23
Day: A
 “Do Now”- Collins Type 1
Writing: In 4 lines
summarize what we
learned this week.
 “Mini Lesson” – Similar
Triangles – 6.3 Day 2
 “Guided Practice” –
Identify similar triangles
and use similar triangles
to solve problems.
 “Independent Practice”
– Students will
determine whether
triangles are similar, find
missing parts of similar
triangles, and find
measurements of real
life examples.
 “Formative Assessment”
- Observe students
during “Independent
Practice”
(6-3) Similar Triangles –
Day 2 – 6-3 Practice
Worksheet