The commonly used teaching and learning approaches in mathematics in Kenya’s secondary
schools and other parts of the world are teacher centered (Oyaya& Njuguna, 1999; Zakaria
and Iksan, 2007) which are ineffective. In this study STAD (CL) teaching strategy which is
student-centered, was used in a mathematics classroom setting and its effects on learners`
achievement in the scale drawing topic of mathematics studied by gender .A comparison of
learners` mathematics achievement by gender was analyzed. The mathematics topic was
selected among those that are poorly performed at KCSE national examinations (KNEC,
2010).