Read other Chinese books with your child.
Often, we forget that the entire point of using Basic Chinese 500 is so that our children will be able to read Chinese (or at least, 500 of the characters, anyway). If you have other Chinese books at home, read them with your child. Point to the characters they should know and have them read only those characters.
In fact, if you’re feeling really lazy, you can just have your children point out the characters they know in children’s books instead of reading the story. The beauty of this is that the fewer characters they know, the faster the story time will go.
If you do not have Chinese books at home, you can always print out Chinese text online and have your children circle or point out all the characters they recognize. This activity is particularly helpful because our children see WHY they are learning Chinese. They are learning so that they can unlock stories written in Chinese, plus they can see their improvement over time as your children can read more and more characters.