For example, if you are using a simple addition and subtraction worksheet with your child, draw or type up another sheet of with squares and numbers printed onto them. Instead of writing the answers to the questions on the worksheet you can get your child to cut and paste the required numbers for the answers from from the second worksheet onto the first.
When you are a parent, and you want to teach your kids ahead of time just before he would go to school, you can use the free online worksheets. There are lots of them available. You can let your kids learn online. Through this, your kids will be ready for school. These online materials are readily downloadable and can be printed for use. And the good thing about this is that you can produce as many copies as you want, until your kid learns and perfect the craft of writing.