In my class at Pt England we each have an account for a programme we do in math called Xtra Math.
When we started Xrta math it showed us easy addition math equations and we get 3 seconds to answer them and if we get all of them correct we move on to subtraction then timetables then division. When we complete three seconds we move on to 2 seconds with medium equations.
When go past that we will move on to 1.5 seconds with hard equations. I think Xtra Math is a great learning tool because it can stretch your brain so you get to know more math in the future.