One great way to teach it is by using math worksheets. One could make worksheets that are fun for children to complete. Adding graphics such as fruit and candy and having the children add them up will open their minds to it and have them learning in a fun way. Also, the sense of accomplishment the child has after completing the math worksheet correctly will encourage him to continue learning the subject.
Don't forget that your efforts with your child's learning are as valuable as the efforts of their teachers. You can have a huge effect on your child's learning at home, by encouraging them to try hard and do well in their studies. There are a number of things you can do at home to enhance your child's mathematical skills if they appear to be struggling with their math studies at school.