Turn the teaching of math from a passive experience for the children into an active one. Have them engage with the subject in a very real way. Ask them questions and get them to solve simple problems themselves or as a group. Get the whole class involved in working out a problem together and make it fun and interactive. Try to include visual props or objects such as soft balls, marbles, blocks and bricks. When learning about shapes, for example, a child will lean far better by touching, handling and studying a three-dimensional rectangular shape than one drawn in an exercise book.
Children always love to play games and there are plenty of ways that math concepts and problem-solving can be incorporated into fun games that will have children learning math concepts almost without realizing it. In this way math becomes far more enjoyable and much less of a chore. This has associated benefits by changing children’s attitude to math overall and making them more likely to engage in other aspects of their math learning.
Take your children out into the real world (it can be as simple as outside on the school field or playground) and show them how math relates to their lives and everyday things. The children will love being outside and suddenly find math class very exciting. Get them to count things such as birds in a tree, find different shaped objects, form groups of different numbers and divide and multiply them -- there are hundreds of activities related to math that can be done outside the classroom.
Most people work far better when there is some form of reward system involved, and children are always particularly enthusiastic about the chance to win a prize. The rewards can be very simple, such as colored erasers or even stamps or progress charts on a wall. The whole class might work towards a reward such as a trip to the zoo when they have all successfully mastered a math concept -- for example, when they all can do the multiplication tables up to 12 without a mistake.