Your aim should be to make math fun for your child and help them gain a solid understanding of the basics. Encourage your child to incorporate math into their daily activities, help them do mathematics worksheets, and then use the lessons therein to create fun activities for your child. The secret to learning math is to have an open mind about it. Just because you hated math doesn't mean your child should, and you will be doing them a disservice if you pass your negative feelings on to them. Make learning math fun, get a comprehensive set of mathematics worksheets to make it exciting and stimulating, and encourage your child's efforts all the way. Every math genius had to start with 1 + 1, just like your child.
Once you have a scope and sequence book, make a list of each area in math that he needs to work on for the school year. For example for grades three and four, by the end of the year in subtraction, your child should be able to: _ Solve vertical and horizontal computation problems _ Review subtraction of 2 numbers whose sums would be 18 or less _ Subtract 1_ or 2_digit number from a 2_digit number with/without renaming _ Subtract 1_, 2_, or 3_digit numbers from 3_ and 4_digit number with/without renaming _ Subtract 1_, 2_, 3_, 4_, or 5_digit number from a 5_digit number