i tell you about process of analysis data briefly:
1 ) you should test normality.
2 ) if data were normal then you should use parametric test.
3 ) if data were not normal then you should use nonparametric test.
if your data were normal but you used nonparametric for them is not false but your accuracy is less than results of parametric test in this case.
i think you can use many test on your data for example between experimental group data in after and before program, you can use tests for compare mean of data , and so on.
i hope you will be succeed