Page | 1 IMPACT OF BLENDED MODELS ON RETENTION AND PERFORMANCE AMONG UNDERGRADUATE BIOLOGY AND GEOGRAPHY EDUCATION STUDENTS IN KATSINA STATE BY AMINU SALISU DEPARTMENT OF EDUCATION FACULTY OF EDUCATION UMARU MUSA YAR’ADUA UNIVERSITY KATSINA 08037446501 aminu.salisu@umyu.edu.ng & ASHIRU AMINU DEPARTMENT OF SCIENCE EDUCATION FACULTY OF EDUCATION KANO UNIVERSITY OF SCIENCE AND TECHNOLOGY, WUDIL ashiruaminu89@gmail.com