Everyone has different strengths. Some students are naturally very good at maths and find it easy. Others have to work a bit harder. The great thing is that there are plenty of resources available to help you. Find out what resources your school has available - they might have books or subscriptions to sites that can help you. Ask teachers for a list of topics to look over. Once you have these, it is up to you to put in the required work until you feel confident. The best way to improve at maths is to practise, practise, practise!