No harm. Then yo won't blame yourself.
But if your child is really smart and confident, no need.
If you just want the vote of confidence, choose the right one.
No need pay for full course, waste money. The beginning 4 lessons and the last 4 will do.
Good luck!
I think it really depends on your child's personality, (shy or not) and whether you expose him/her to a lot of daily knowledge, information, reading...etc. I personally don't have much time in spending with her for academics and daily knowledge, and we speak all english at home, so sending my daughter to these classes were definitely a LIFE SAVER for us.
There are very good ones out there, and so so ones. Make sure you go to the really best one, LOTS of information and experience from them. I am SO glad we went for 3 months.
My daughter has been accepted into each school we got a letter for thus far.