Variance as a function of time is described for the Cambridge Local Examinations Syndicate's examination standards, with emphasis on the performance of candidates from Botswana and Zimbabwe. Results demonstrate the value of simple linear modeling in extracting performance trends for a range of subjects over time across six countries. (TJH)

The University of Botswana, Lesotho and Swaziland Schools Examinations Council (UBLS/SEC) is preparing to expand its external examination and certification responsibilities, as well as its role in primary and secondary school curriculum development within its member countries. This plan addresses the educational measurement aspects of the…