Khan Academy – Grade 5 (Content was selected for this grade level based on a typical curriculum in the United States). If you want harder or easier stuff, search for the curriculum one grade level higher or lower.
This is a GREAT tool for Home Learning. Watch a video or 2, try some of the questions. Get stuck – click ‘get a hint’ or watch the video again, or watch the second video – there’s normally at least 2 videos.