Never homeschooled, but I know math and math education. Have them doing math regularly. Some every day is better than once a week in a block or whatever. Nice part about homeschool is that they can do it at their own pace. If something is more difficult, slow down and master it. If something is easy, move on. But do it regularly and make sure there are no gaps in knowledge.
True words. The only way to get better at math is to work the problems