In spite of the preponderance of in-service education programmes in Nigeria, no noticeable impact has been recorded in terms of actual improvement in the quality of secondary school biology teaching.  The purpose of this study therefore was to ascertain the effect of a Constructivist-based...

This paper stresses the importance of heterogeneity in learning rules. We introduce an evolutionary competition between different learning rules and demonstrate that, though these rules can coexist, their convergence properties are strongly affected by heterogeneity. We consider a Bertrand...