I met Joan Cotter at a homeschool conference 12 years ago. I used her program to teach my two older children math for grades K-4. When they entered traditional school they were well above their peers. In fact, my son had his math IQ tested in 2nd grade and scored 182!! When the counselor was testing him orally, he thought my son was cheating because he didn’t need to write down anything! In reality, he was just doing the word problems in his head!!!