This study examines the effect of one of the methods of
cooperative learning—STAD on achievement in science in an
Indian context. The study used two intact classes of 9th grade
students with 36 students. Both the classes were taught the
same context for a duration of twenty five instructional days.
Students in the experimental class worked in small
heterogeneous groups to learn the content while the other class
was taught by traditional lecture-discussion method. Students’
outcomes were measured by an achievement test development
for this purpose. Data analysed through analysis of covariance
revealed that STAD was more effective than traditional method
for knowledge level as defined by Bloom’s taxonomy. However,
both the methods were found to be equally effective for
comprehension level.