My son started with Mathnasium when he was 5.5 years old and could barely write numbers from 1 to 10. Fast forward now after 2 good years of having weekly classes with Mathnasium, he is very advanced and is learning 4th grade math even though in school he just finished grade 1.Mathnasium approach to teaching math is very effective. It simplifies the subjects and make it fun and joyful for children to learn. Children practice every subject until they reach mastery level. Thanks to Mathnasium my son loves math and likes to challenge himself solving problems with bigger numbers.