Scratch

Now i have make a a working version of a vision a before i begin to
program scratch math training program which keep track on error
and how fast the answered is, then it repeat the worse,
so level one, 15 questions  show in order, and repeat 4
so level two, 20 questions  show random, and repeat 8
so level three, 30 questions  show random and show both a+b and b+a, and repeat 8

Making a training round show all question excaltly one time and repeat the ones
needs training

http://scratch.mit.edu/projects/klasbricks/350627
and it show numbers as blocks to making easy to understand plus,
and never say wrong only show right number of block on first error,
on second error show right answered which is needed to enter to leave that question
If you want to build a math training program this can be used this as a base.

Later i would try to build small simple scratch games, which will used numbers, and repeat the one needed, 
please add more ideas to
http://skol.wikispaces.com/scratch_ideas_eng

Please try it and say what is needed to improve to give better help or to stimulate student to make more training