INTERNATIONAL JOURNAL OF EDUCATIONAL MANAGEMENT (IJEM) VOLUME 1, NUMBER 1, 1989 ISSN0794—7684 Publish by Department of educational Management, university of Ilorin, Ilorin. CONTENTS Editorial Board………………………………………………………….. i Editorial Comments…………………………………………………….. ii Contents…………………………………………………………………. iii-iv Notes of Contributors…………………………………………………… v 1. constraints on Educational Planning and Development: Case of Nigeria. - Professor Segun Adesina………………….. 2. 1 Educational Facilities and Students’ Performance in WASC Examination. - Professor Aderemi Olutola…………………. 3. “Leaders are made not born" : An Analytical Appraisal - Dr. A. L. Ogunlade…………………………… 4. 17 20 Application of Modern Management Techniques for effective institutional level. - Professor H. N. Pandit…………………….. 5. 35 Auditinig the Production of Secondary Education through the measurement of message in Nigeria Schools. -Dr. I,0. Kuroaaro……………………………… 6. 44 Approaches to developing a sound science and technology base in Nigerian school system: perceptions of Educators, Scientists, Technologists and Industrialists. - Prof. Anthony Ali and Rev. (Dr.) A. Akubue………………………….. 7. 58 The Programmes Expenditure Models Budgeting (PEMB): An Option to the National Universities Commission's Resource Allocation Parameters. (NUCRAP). -Dr. F.O.E. Obayan………………………………. 8. 68 The Management of Human Resources in the Nigerian University System. -Prof. J.A. Aghenta………………………………. 9. 80 The supply and demand for Technical and Vocational Teachers in Junior Secondary Schools in Kwara State. -Mr. N.B. Oyedeji…………………………………. 91 10. The School as an Organisation. - Dr. A.A. Mordi…………………………………… 11. 100 A Critical Analysis of Education and Unemployment Problem in Nigeria. - Ogunrinola, I. O. and Oladeji, S. I...………… 12. The Teacher Factor in the Nigerian Educational System. - Professor A. Babs. Fafunwa………………… 13. 108 123 Social Development and the Challenge of Adult Education Management in Nigeria. - Mr. I. 0. Oni……………………………………… 14. 130 Setting Equitable Educational Standard for Nigeria: Problems and Prospects. -Dr. J. A. Omotosho……….…………...… 15. 138 The Financial Implications of the 6-3-3-4 System for Universities: A Case study of Lagos State University -Dr. Tunde Samuel……………………….. 16. 148 Part-time Teaching as a way of easing teacher unemployment in Nigeria. -Mr. Afolabi Popoola……………………. 17. Notes to Contributors…………………………………….… 155 163 44 International Journal of Educational Management, Vol. 1, No. 1 1989 AUDITING THE PRODUCTION OF SECONDARY EDUCATION THROUGH THE MEASUREMENT OP WASTAGE IN NIGERIAN SCHOOLS DR. D.O. DUROSARO ABSTRACT Obviously, as a result of the scarcity of fund, we are having problems with providing adequate educational facilities to our people. But, inspite of this problem, we have been wasting our limited resources in various ways at the various educational levels and there is need to measure this wastage and take steps to minimise it. This study focused attention on the computation of student wastage rates, at the secondary level in some states of Nigeria using same as measurement of both efficiency and effectiveness if the system. The crude cohort analysis and, correlation analysis if other factors on student wastage were also computed. The findings revealed, among other things that secondary education in Nigeria is experiencing serious student wastage through repetition, dropout and fail-out of students. The crude cohort wastage rates were 84.88 per cent for Bendel state, 64.02 per cent for Kwara state, 68.73 per cent for Ondo State and 66.89 per cent For Oyo State. Other environmental factors like financial difficulty of parents, withdrawal of students from school to seek employment, dismissal student for disciplinary purpose and natural factors such as death of students, illness and pregnancy of female students have no Significant relationship with student wastage. Based on these findings, some suggestions were made on how to minimise student wastage in schools. INTRODUCTION Nigeria, like many other countries of the world, is presently countering severe economic depression. There had been sudden significant drop in the oil revenue and the consequent reduction the amount of resources available for distribution among the various sectors of the nation's economy. This notwithstanding a dilemma that is increasingly assailing the educational system the country is the need to expand education and ensure its quality, We also need to ensure that the large number of non soling, school-age population get educated. The scarcity of trees facing the system had led to the introduction of some efficiency measurement criteria, which were previously left exclusively for the areas of commerce and industries, to the field of education. However, education, unlike commerce and industry has multidimentional input and output. In order to measure the efficiency of the educational necessary to find cut what the input-output relation is . IJEM, Vol. 1, No. 1 1989 45 The major output of educational system is the graduate. The production of a single graduate will require such inputs as teachers, textbooks, classroom, furniture and equipment which are quantified, monetarised and costed per student year. Wastage in education could be used, as an expression of the efficiency of resource management (Coombs and Hallak (1972:77) and three categories of student wastage are identified as drop outs -those who left without completing their course; repeaters - those who read a class more than once and fail-outs those who failed to obtain the terminal certificate and are thus unable to utilise the training received. Various ways of measuring student wastage had been adopted in some previous studies. For example, Rao and Tikkiwal (1966:230), measured student wastage in a given course of education as consisting of three aspects namely: wastage as a result of stagnation; wastage due to drop-outs and wastage owing to non-utilization of the training received during the course. They gave quantitative measurement of the three types of wastage with the use of a case study conducted at the university level. The result of their study carried out in India, revealed that the wastage due to stagnation was 2.30 per cent, the wastage due to drop out was 5.86 per cent and the wastage owing to nonutilization of training received was 39.4O per cent. The picture may be different for other levels of the educational system in some other countries. Similarly, Okedara (1981), conducted a study relating to formal and nonformal education wastage in Ibadan at the primary level using 60 adult learners and 369 pupils enrolled in one of the primary schools. The result of the comparative analysis showed that wastage rates were not the same for the two groups but were higher among the adult learners than among the pupils enrolled in school. But the major causes of wastage were quite similar for both groups. Moreover, in a related study to that of Rao and Tikkiwal, Ojo (1980), studied student wastage in Nigerian universities and he tried to determine the marginal efficiency of investment in university education and the impact of wastage on manpower planning in Nigeria." Am interesting aspect of the study was that it revealed that some of the causes of wastage in Nigerian universities include lack of interest in the course selected, poor guidance and counselling poor level of commitment of some lecturers to their jobs, scarcity of resource materials and financial handicap. It might be useful to find out if the same are true for other levels of the Educational system in Nigeria. Also, UNESCO (1970) gave some statistical measurement of educational wastage. The study highlighted three methods of measuring wastage as including: the apparent cohort method, the reconstructed cohort method and the true cohort method. This cohort analysis method had for some time been serving useful purpose to researchers on the problem of student wastage. For example, Durosaro ("1985) adopted the reconstructed cohort method in studying the internal efficiency of the secondary education in Bendel State. 46 International Journal of Educational Management, Vol. 1, No. 1 1989 The total wastage rate was found to be 19.19 per cent out of which wastage due to repetition accounted for 4.05 per cent, wastage due to drop-outs accounted for 0.68? per cent and wastage owing to failure in West African School Certificate Examinations was 14.45 Per cent. However, owing to the peculiar nature of the inputs to the educational industry, there can be no situation of perfect efficiency in the schools. Hence, the African Ministers of education at their Addis Ababa Conference in 1962 gave a recommended permissible cumulative wastage rate of 41 per cent for African Schools (Adesina (1983:34). The efficiency of individual school could [therefore be measured with this prescribed yardstick from time to [time. Apparently, owing to the paucity of resources, we are having (problems with providing adequate educational facilities to our people but despite this, it seems we have been wasting our scarce |resources in various ways. Hence, there is the need for measuring this wastage in some ways and taking steps to reduce it. This study therefore focuses on computation of student wastage rates at the Secondary level of Education in selected schools in some states of Nigeria with a view to highlighting the various causes of student wastage in the schools and suggesting measures that [could be taken to reduce it. It is hoped that the findings of this study will help to guide the policy makers and educational managers to trace the major causes Sand measures of minimising student wastage, especially at the Secondary [level of our educational system. It will also help to guide teachers [to know how to measure the effectiveness of their classroom operation [from year to year. METHODOLOGY The data used for this study were collected in 1987 from one hundred and sixty secondary schools. The schools were selected by stratified random sampling from the schools located in the state [capitals of Bendel, Kwara, Ondo and Oyo States. Only schools that id been graduating students were included in the sample. A pilot tested questionnaire styled Secondary Education Student Wastage. Analysis Questionnaire (SESWAQ) was used for the data collection. The questionnaire had five major sections which included identification of school, enrolment history, student flow history attrition history and the West African School Certificate Examination's performance history of the cohort admitted to the schools during the 1982/83 session. A section of the questionnaire also collected information about other factors responsible for student wastage in schools. The data collected were collated and the reconstructed cohorts the pupils in the schools sampled in each state were prepared. The cohort analysis technique was used to compute the crude cohort stage rate, that is, the loss of students between the first and final years of the course as the cohort passes through the level of education. IJEM, Vol. 1, No. 1 1989 47 This was computed using the algebraic notation: Wkt = Nkt - Nkt+5 x 100 Nkt Where Wkt refers to crude cohort wastage rate; Nkt refers to number of students enrolled in form 1 in the schools during the 1982/83 session and, Nkt+5 refers to the number of students from the cohort that finally got to final year in 1986/87 session and who graduated successfully with passes in five subjects at credit level and above. Also, the student wastage rates due to repetition, drop - out and fail - out of students/were computed. In analysing the data on the contribution of other factors responsible for student wastage in the schools, in terms of financial difficulty of parents, dismissal of students, students withdrawing from school to seek employment, death, pregnancy of female, illness and pupils academic incompetence; the correlation analysis was computed using the crude cohort wastage rates of the sampled schools in each state as the dependent variable and the other factors mentioned as the independent variables. The statistical package for the social sciences (SPSS) format was used for the computation. RESULTS AND DISCUSSION The data collected were summed up for all the schools sampled for each state and the reconstructed cohorts were prepared to trace the evolution of the cohorts CLASSES YEARS FORM FORM 1 2 FORM 3 FORM 4 FORM 5 OUTPUT SUCCESSFUL GRADUATES 89 1982/83 4445 156 1983/84 445 3912 32 548 3208 1985/86 270 481 2695 1986/87 270 43 2156 2113 Fig. 1 Flow of cohort in the schools sampled from Bendel State. 672 48 International Journal of Educational Management, Vol. 1, No. 1 1989 Figure 1 presents the reconstructed cohort of the samples for Bendel State, The cohort diagram shows that a total of 4445 students were admitted In to form 1 in the chosen schools in 1982/83 session. Of this number, only 672 graduated successfully, 3775 students constituted wastage as a result of repetition of classes, dropping out before completion of course or failing out in the final examination. The findings of the study, as computed from figure 1, revealed that the crude cohort wastage rate for the sampled schools in Bendel State was 84.88 per cent. Of the said wastage rate, 39.24 per cent was owing to repetition of students, 13.27 per cent was owing to drop-outs while wastage owing to fail outs in West African Schools Certificate Examination was 32.42 per cent. CLASSES YEARS FORM FORM 1 2 FORM 3 FORM 4 FORM 5 OUTPUT SUCCESSFUL GRADUATES 94 1982/83 4683 1983/84 281 4308 307 1984/85 474 3834 245 1985/86 1986/87 460 3067 123 2699 2699 1685 Fig, 2: Flow of cohort. In the schools sampled from Kwara state. The findings, as regards, Kwara State schools are presented in figure 2. The reconstructed cohort of the schools sampled shows that 4683 students were enrolled in from 1 in all the sampled schools during the 1982/83 session. Out of this number, only 1685 students successfully graduated from the school 2.998 students constitutor; wastage to the system by repeating classes, dropping out or failing out in the end. The crude cohort wastage rate was computed as 64.02 per cent. 28.57 per cent of the wastage was owing to repetition of students, 13.79 per cent was owing to drop out while fail out of students accounted for 21.65 per cent of student wastage in the school sampled in Kwara State, IJEM, Vol. 1, No. 1 1989 CLASSES YEARS FORM FORM 1 2 49 FORM 3 FORM 4 FORM 5 OUTPUT SUCCESSFUL GRADUATES 211 1982/83 4225 203 1983/84 634 3380 115 1984/85 304 2873 272 1985/86 287 1986/87 198 2471 2002 1982 1321 Fig. 3: Flow of cohort in the schools sampled from Ondo State. Figure 3 presents the reconstructed cohort diagram of the schools sampled in Ondo state. The figure shows that 4225 students were enrolled into form 1 in all the schools sampled for the study in Ondo state. Of this number, only 1,321 students successfully completed their courses, 2904 other students constituted wastage in the system. The crude cohort wastage rate was computed as 68.73 per cent for the schools sampled in Ondo state. The wastage owing to repetition was found to be 33.68 per cent while wastage due to drop - out was 18.96 per cent. The wastage owing to fail out of students in West African School Certificate Examination was 16.12 per cent. CLASSES YEARS 1982/83 FORM FORM 1 2 FORM 3 FORM 4 FORM 5 OUTPUT SUCCESSFUL GRADUATES 4720 217 1983/84 378 4342 111 1984/85 434 3691 263 1985/86 295 3285 27 1986/87 329 2694 2667 Fig. 4: Flow of cohort in the schools sampled from Ondo State. 1563 IJEM, Vol. 1, No. 1 1989 50 The findings with regard to Oyo state schools is figure 4, The figure shows that a total of 4,720 students were enrolled in all the sampled schools from Oyo state in Out of this number enrolled, only 1,563 students successfully graduated. 3,185 students precipitated wastage in the system. The crude Cohort wastage rate of the schools sampled was computed as 66.89 per cent. Of this amount if wastage, 30.42 per cent was owing to repetition, 13.10 per cent was owing to drop-out while 42.0 per cent was as a results of fail out of student at the final year. Table 1 presents a summary of the findings for the in the four states. A. juxtaposition of the findings a table 1 makes it easy for quick comparative analysis,, table shows for all the states, over sixty per cent of the student enrolled in the 1932/83 cohort contributed to wastage in one form or the other. The findings for the four states revealed repetition of students contributed the largest proportion wastage of the total wastage in the system. It is also noteworthy that for failure of students in the West African School Certificate Examination constituted the second major contributor to the magnitude of wastage experienced in the system. The incidence of Drop-out to have contributed least to the wastage in the system. The reason may be due to the fact that student as well as their greatly realised the need for proper education, as an investment for better future. The effort of the new dispensation on war. Against indiscipline is also gaining reflection in the schools. However minus repetition drop - out, and fail - out some other factors that have been influencing wastage schools, in these factors include financial difficulties of parents, dismissal of students, withdrawal, from school to seek death, pregnancy in female, illness and academic incompetence of pupils. This study sought to find out the relationship of each these factors to wastage in the sampled schools in each state using the correlation analysis. In computing the correlations analysis, the factors were grouped into two categories., These include those factors that are environmental such as financial handicap of parent, withdrawal of student from school to seek employment. Dismissal of students as a result of discipline problems, and academic incompetence of the students. The second category include those factors that relate to nature such as death, illness and pregnancy in female students. The finding of the correlation analysis of the enviromental factors are presented on Table 1. IJEM, Vol. 1, No. 1 1989 51 Table 1. Correlation Matrix of Student wastage and some environment factors in the sampled schools in Bendel State. F1 F2 F3 F4 W F1 1.0000 F2 0.7568 1.0000 F3 0.4109 0.4061 1.0000 F4 0.6999 0.2750 0.6634 1.0000 W5 0.1750 0.0363 0.1245 0.2208 1.0000 F1 = Financial difficult F2 = Withdrawal to seek employment. F3 = Dismissal on grounds of discipline, F4 = Academic incompetence of student, W = Wastage rate. According to the findings on table 1, all the environmental factors have no significant relationship with wastage. Only financial difficulty of parents has a positive but significant relationship while withdrawal to seek employment, dismissal on grounds of discipline and academic incompetence of students show negatively low correlation. This findings imply that the environmental factors may not have significant influence on wastage in Bendel State schools. Table 2 presents the findings with regard to other factors that might influence wastage. It seems clear from the findings that all the factors tested show no significant correlation to wastage rate. Table 2 Present the finding with regard to other factor that might influence wastage. It seems clear from the finding that all the factors tested show no significant correlation to wastage rate. Table 2 Correlation Matriz of Student Wastage and other natural factors in the Sampled schools in Bendel State. F5 F6 F7 F5 1.0000 F6 0.0798 1.0000 F7 0.9526 0.1209 1.0000 W 0.0571 0.1245 0.0500 W 1.0000 F5 = Pregnancy in female students, F6 = Death of students, F7 = Illness of students and W = Wastage rate of student in schools IJEM, Vol. 1, No. 1 1989 52 While the factors of pregnancy in female students and death of students have low positive correlation with wastage, the factor of illness of students have very low negative correlation with wastage. The findings of the correlation analysis for schools sampled in Kwara State are presented on Table 3. The table presents the correlation matrix for student wastage and the environmental factors in the schools .sampled. According to the Table, all the factors show no significant correlation with student wastage in the schools. The factors of finance and employment show negative correlation with wastage while the factors of dismissal of students and academic incompetence show positive correlation, The correlation matrix for other factors of wastage due to nature and presented on Table 4. Table 3. Correlation Matrix of student wastage and environmental factors in the sampled school in Kwara State. F1 F2 F3 F4 F1 1.0000 F2 0.1855 1.0000 F3 0.1786 0.2010 1.0000 F4 0.7023 0.3444 1.4530 1.0000 W 0.1271 0.1172 0.1979 0.1147 W 1.0000 F1 = Financial difficult F2 = Withdrawal to seek employment. F3 = Dismissal on grounds of discipline, F4 = Academic incompetence and W = Wastage rate. Table 4: Correlation Matrix of student Wastage and other natural factors in the sampled schools in Kwara State. F5 F6 F7 W F5 1.0000 F6 0.4138 1.0000 F7 0.2358 0.1390 1.0000 W 0.2202 -0.1979 -0.2314 1.0000 F5 = Pregnancy, F6 = Death F7 = Illness and W = Wastage rate IJEM, Vol. 1, No. 1 1989 53 The r - values of the three factors show no significant relationship to wastage. While pregnancy has positive correlation with wastage, both death and illness have negative correlation with wastage. This shows these factors have no significant relationship with wastage in the sampled schools. As regards the schools sampled for Ondo State, Table 5 presents the correlation matrix for wastage and the environmental factors. The table shows that the environmental factors have no significant relationship with wastage. Out of the four factors, academic incompetence seems to have non significant negative relationship to wastage. Table 5 Correlation Matrix for student Wastage and environmental factors in the sampled schools in Ondo State. F1 F2 F3 F4 F1 1.0000 F2 -0.6670 1.0000 F3 -0.3117 0.4890 1.0000 F4 -0.5411 -0.1063 0.1305 1.0000 W 0.0856 0.1134 0.0081 -0.1200 W 1.0000 F1 = Financial difficult, F2 = Employment, F3 = Dismissal incompetence and W = Wastage. F4 = Academic The correlation matrix for the other natural factors and student wastage in the sampled schools in Ondo state are shown on Table 6. Table 6: Correlation Matrix for Student Wastage and other natural factors in the sampled schools in Ondo State, F5 F6 F7 W F5 1.0000 F6 0.0498 1.0000 F7 -0.8622 0.3239 1.0000 W -0.2567 -0.0277 0.2233 1.0000 F5 = Pregnancy, F6 = Death F7 = Illness and W = Wastage rate IJEM, Vol. 1, No. 1 1989 54 The findings also reveals no significant correlation between the factors and wastage rate in the schools. The correlation matrix for the student wastage and the environmental factors in the schools sampled Iron; Oyo state are presented on Table 7. Table 7: Correlation Matrix for Student Wastage and other environmental factors in the sailed schools from Oyo state. F2 F1 F1 1.0000 F3 F4 F2 -0.1383 1.0000 F3 0.1921 0.0183 1.0000 F4 0.0756 -0.0124 0.0211 1.0000 W 0.0740 0.0679 -0.1544 -0.4257 F1 = Finance, F2 = Employment, W 1.0000 F3 = Dismissal F4 = Academic incompetence and W = Wastage rate. The correlation matrix shows that the environmental factors have no significant relationship with wastage in the schools. Only the factors of academic incompetence seems to show a fairly high :negative coefficient of –0.4257. While the factor of dismissal of students too show negative correlation with student wastage, Financial difficulty and withdrawal from school to seek employment have positive correlation with student wastage in the schools. The other natural factors of pregnancy, death and illness were also correlated with student wastage in the Oyo state school and the findings are presented on the Table 8. IJEM, Vol. 1, No. 1 1989 55 Table 8: Correlation Matrix of Student Wastage and other natural factors in the sampled schools Oyo state. F5 1.0000 F6 F5 F6 0.2635 1.0000 F7 -0.5984 0.0979 1.0000 W 0.1347 0.1544 0.0563 F5 = Pregnancy, F7 W 1.0000 F6 = Death, F7 = Illness and W = Wastage. The table reveals that even though there is no significant correlation between the factors of Pregnancy, death and illness and the dependent variable of student Wastage in the sampled schools, there is positives correlation of all the factors with student wastage. This means that these natural factors of pregnancy, death and illness are likely to have relationship with wastage in the schools. CONCLUSION AND RECOMMENDATION This study had focused mainly on the assessment of the internal efficiency of secondary schools through the measurement of student wastage. Three major aspects of students vast age measured include! student wastage owing to drop outs and student wastage due to failure in the final examination leading to non- certification and non-utilization of training acquired. The study found out, among other things, that the crude cohort wastage rates of secondary education in Nigeria were 84.88% for Bendel state, 64.02% for Kwara state, 68.73% for Ondo state and 66.89% for Oyo State. It was also discovered that other environmental factors like financial difficulties of parents, withdrawal of students from school to seek employment, dismissal of students for disciplinary purpose, and academic incompetence of students had no significant relationship with student wastage. Also, the study revealed that other wastage factors associated with natural phenomena like death of students, illness of students and pregnancy of female students had no significant relationship with wastage too. It is rather obvious from the findings of this study that the secondary education in some states of Nigeria is experiencing serious student wastage which makes the efficiency and effectiveness of the system quite questionable. This situation appears to be matter serious concern to Government, teachers, IJEM, Vol. 1, No. 1 1989 56 parents and the educational planners and it becomes imperative to find out the causes and suggest measures to prevent student wastage in our schools. Based on the findings of the present study, the following recommendations are put forward as measures to minimise student wastage in schools. The Ministry of Education should ensure through the inspectorate division that arrangement is made by all schools to provide remedial coaching to the academically backward pupils. This remedial classes could be held after the normal school period, possibly in the evenings. This will help reduce the incidence of repetition. The remedial coaching classes could operate spiral curriculum that will permit students to interact with the curriculum items for each subject at the point where the amount of cognitive disequilibrum promotes learning (Fajemidagbe 198U). School should be discouraged against over-sized classess since this may affect the teacher effectiveness. The Government should take step to encourage the establishment of Guidance and Counselling unit in each school. This will be beneficial to pupils in terms of subject selection, sex education, health education and disciplinary areas. There is also the great need for government to legislate and ensure strict compliance by parents on the issue of employing young people who should be in school to serve as bus conductors, or hawkers. It may be useful for further correlation studies to be conducted across the states on teacher wastage and student wastage at secondary education level, especially these days when the level of funding of schools is declining. This might help come up with suggestions to improve teacher effectiveness which may in turn reduce student wastage in our schools. REFERENCES Adesina, Segun: Education for Development: The challenges of the 1980s" in Adesina, S., Akinyemi K. and K. Ajayi (Eds.), Nigerian Education: Trends and Issues, Ile-Ife, University of Ife Press, 1983, p. 34. Coombs, P.H. and J. Hallak (Eds.), Educational cost analysis in action: case studies for Planners, Paris, UNESCO - IIEF, 1966. Durosaro, D.O,: Resource Allocation and internal Efficiency of Secondary education in Bendel State, Nigeria. Unpublished Ph.D. thesis, Ibadan, University of Ibadan, 1985. Fajemidagba, O. "An empirical approach to sequencing mathematics curriculum items”, in Nigeria Journal of Curriculum Studies, Vol. II, No. 1, Feb. 1984. Nwankwo, J. I. Educational Planning: Theory and Practice, Lahore, Izharsons Ltd., 1981, pp. 184-189. Ojo, F. : Student Wastage in Nigeria Universities, Human Resource Research Unit, University of Lagos, 1980. IJEM, Vol. 1, No. 1 1989 57 Okedara, J.T.: A Comparative, study t of formal and non formal educational wastage in Ibadan, Institute of Education, University of Ibadan, 1981. Rao, G.M. and B.D. Tikkiwals "An integrated approach to the study of wastage in a given course of education" in Sankhya Series B. Vol. 28, 1966, pp. 229236. UNESCO. The statistical measurement of Educational Wastage: Drop-Out, repetition, and school retardation, Paris, IIEP, 1970.