Explore place value and decimals and addition/Subtraction on the link below.
Have a go at the quiz.
Depending on what you already know, the site will help you learn from your specific level. How cool is that?
I'll look into signing you all up as a class, but for now you can still get started.
You've also got E-Ako too, don't forget that.
khanacademy.org/ Year 5 LINK