Although there are times when we don't get on with our brothers or sisters we should still remember to pray for them. Here are some things that you may want to pray for your brother.
If your brother isn't a Christian then you should ask God to help you and other people to talk to him about Jesus.
If your brother is a Christian then pray that he will become a better and stronger Christian.
Pray for your brother and his school work, any problems he has at school, any exams he will be taking.
Have you had an argument with your brother? If so, you should pray about it. Ask God to help you say sorry and sort things out. Pray that you won't get into arguments in the future.