UFO wrote:I heard that left handed people are more creative one as they use heavily right hemisphere of their brains. They are good at art, music, etc..
You are right! Each of the hemisphere has its own use. It's proved that the right hemisphere of left-handed people' brains is more developed while the left one of right-handed people' brains work out better . So the left-handed people often more creative and imaginative so they good at art or creative activities(just often) and right-handed ones think better especially logical problems, they good at maths, sciences. Anyway, I write by my right hand.
UFO wrote:I started to use my right hand and do exercises for 20 minutes by writing something on a piece of paper. This is a good exercise to improve my intelligence.
That's true. It's a way to improve your brain's power
Another point I want to talk is that it's logical someway when your teacher forces you to write by your right hand. As you know, most of us write from left to right on the page. It's not natural random that human use right hand and write from left to right. If you write by left hand, just inconvenient for you when your hand cover the word right after you write the next one -> you can't see what you've written and sometimes the hand can smudge the words. It's similar that you use your right hand and write from right to left. Try, you'll know what I mean