A parent must know what level of math and any other subject, for that matter, that their child is performing at every school year. When children enter kindergarten and the school recommends that children know their ABC's and know how to count to twenty or whatever number, it is the parent's responsibility to make sure the child is prepared prior to enrolling in school.
Go Shopping! : You can cater this to all different ages. For young children, you can do a 'mock shop' and let them pretend to go shopping in a pretend store (your kitchen). Label certain items with easy to read prices and print some pretend money for them to shop with! For older children, you can let them help you in the actual grocery store with a specific shopping list. You can even set specific spending limits and give a specific amount of items and let them determine what they can afford, etc.
While the newer method does require computer access for every child, most schools now have that capability. As children do more hands-on learning on computers and less in books, these programs are capable of reaching them on a level they can understand.
In addition to good teachers and involved parents, children should be involved in extracurricular activities that support math. In the state of Michigan, students can join a club at their school that plays a game called Academic Games. This form of gaming is challenging for children. It helps them to develop their academic skills as well as their math skills. Children can start playing these games as early as the second grade. This form of gaming will teach children how to play the game of Equations, a form of Algebra, at the age of seven. These skills are called Higher Order Thinking Skills.