Before my kids were even homeschooling, I came up with a learning game that all my kids could play. It was a way to quiz them on stuff that they were all learning, but yet have them play together. I made up a game board with colored squares of construction paper. You could also just use a candy land game board or any board you had. It also required a dice or pair of dice (depending on how fast you want the game to go).
Then you make cards in different colors for all of your kids with questions you want them to learn. I had spelling words, math problems, Spanish words, quiz items. I also put in some fun cards that were things like "do a silly dance" or "make a funny face" or "spin around 10 times" mixed in.
I would put small coins and candies (like tic tacs or M&Ms) on spaces of the board. If you got a question right you got to shake the dice and move, and if you landed on a prize you got to keep it. There was a slightly bigger prize at the end that the first person to reach the end won.
My kids LOVED this game. Its simple and makes practice fun.