Efficiency of using VNS algorithm for forming heterogeneous groups for CSCL learning

The students were tested before and after CSCL of calculus contents. The statistical analysis shows that the students divided by VNS algorithm had significantly better results than the students divided randomly. But the students divided by VNS algorithm were as successful as the students divided without computer. This means that the students' learning achievement in calculus contents is better when they are divided by VNS than randomly, but is as successful as the cooperative learning in heterogeneous groups when VNS was not applied.