When my 5-year- old daughter joined CMA Mental Arithmetic 7 months ago, she tooks a long time to count and sometimes ever making,some mistakes in writing number 6 and 9. However, soon after she joined CMA Mental Arithmetic, she can count faster than her mum…hahaha. CMAMental Arithmetic is not only improving my daughter’s skill in arithmetic, but also increasing her brain’s development in a fun and interesting way.