Karthik and Subraction

I started teaching Karthik Subtraction. Yesterday was the fourth class of subtraction, and I was amazed that Karthik could do all the sums. To make it more interesting and give him more practise I found a game website which has games for subtraction. And Karthik did 20 sums all correct!!. Just wow!!. Well, I felt just proud and happy that I did a good job, happier than a personal achievement.
 But, I do know people around me will say, what is the hurry, why am I burning him out. But, they dont realise that, it is a two way process Karthik should be willing to learn and I should be ready to teach. Only when that happens, we can see results.