Are you a fan of quizzes? In that case I think you should try Education Quizzes. It’s made for native speakers of English mainly, but if you choose the easier questions you’ll be ok. E.g. KS2 English. All kinds of questions on everything from spelling to adjectives and improving vocabulary.
There are also quizzes on maths, science and chemistry. And – not forgetting the Fun Quizzes on topics ranging from books to British Isles and nature.
It does cost 3 punds/month but I think it’s definitely worth a go – at least to try out for a month. You can also print the quizzes if you want.