practise resources for basic sorting I have to prepare for a midterm and I am looking for a resource where I can practise the three basic sorting algorithms insertion sort, bubble sort and selection sort a little.

Last year they had to sort an array with n elements and the elements were integers with values between 0 and m-1 and the complexity had to be of O(n+m).

I did not find any good resources as most of them deal with more advanced topics and prepare you for interviews. 

So I would be glad if someone could give me a good hint.
What do you mean by "practice sorting"? Sets of data to sort by hand? Just whip something up with a random number generator. Examples showing how the methods work? At least Wikipedia has detailed algorithms with pretty animations, or search for "algorithm animation", it is quite popular.