hi, my son is also learning Abacus. He is in 3rd std and he has strong command in maths. Basically it is a stress free education technique for right brain development of children up to 14 years. Abacus is a brain development programme & there are short cut tricks in vedic maths.
Few benefits of Abacus learning are as follows:
Concentration by visualization
Speed & accuracy
Self confidence by removing phobia of mathematics. For more details click on link below