The study investigates the effect of Activity based Blended Learning strategy and Conventional Blended Learning strategy on students' achievement and motivation. Two groups namely, experimental and control group from Sultan Qaboos University were selected randomly for the study. To assess students' achievement in the different groups, pre- and post. achievement tests were used. Three ways 2x2x3 ANCOVA and 2x2x3 ANOVA were used to test for significance. The results of the study (N = 52) show that there was a statistically significant difference between the two methods in terms of students' achievement and motivation favoring the activity based blended learning method (n =26). No significant difference was found due to gender or GPA for both achievement and motivation. In addition the results show no interaction effects for the independent variables. The study concluded with some recommendations.