I don't know about you but when I was at school, which wasn't so long ago, I had terrible troubles with fractions - and maths in general. I did alright in the end, but I could have done with some help.
In fact something like MixedUp would have been very handy indeed. It's a simple application that tests your knowledge of fractions and rewards you with points for every calculation you get correct.
On one side of the equals sign you have a fraction and on the other side only half. You must fill the gap with a number to balance the equation.
Get it right and you get an 'Excellent' and a point. Get it wrong and it's extra homework for you. The difficulty is aimed at younger school children and you never know they might find it fun!