My daughter always wants to be the first and wins in everything. When someone else is better than her, she becomes a very sore loser. How do I teach her the spirit of sportsmanship?

Over-praised might lead to this situation. I am also learning to praise less on my children when they do something good, e.g. you are a good boy! You are so clever. Instead, I choose to acknowledge their efforts during the process. E.g. you seem to work very hard to get the spelling correct.