For kids that have a basic interest in math, try using daily riddles to keep them thinking throughout the day. At breakfast, you may ask your child a riddle like, "What number has three tens and four ones?" or, "What is a mathematician's favorite dessert?" Your child can take the day to think about the riddle and tell you the answer when you're working on math practice worksheets after school!
Group students into pairs, and have them place their desks together in a way that forms a large circle in the classroom (or clearly-defined rows.) Pass out the assignment you want students to complete and have each person in the pair choose to be Partner 1 or Partner 2. Set a timer for an appropriate amount of time for each pair to complete the first question or problem in the assignment, then sound a signal to let all the Partner 2's know to move one seat down the row or clockwise while the Partner 1s stay in place. The new partnerships then work together to solve the next problem. Halfway through the assignment, announce that students should switch roles, and now the Partner 1s will rotate while the Partner 2s stay in place.