I teach 8th grade and am the advisor for the National Junior Honor Society, so whenever we have elections, I always hear the speeches first. Here are some common themes and ideas:
1. The candidate addresses their qualifications for the position, usually including a willingness to work hard, academic success, commitment to help out and attend meetings, a listening ear to the student body, and an ability to lead. If you have previous leadership experience in other areas, include that as well, like team captain or holding office in other clubs.
2. The candidate addresses plans and potential ideas for their time in office. Depending on your situtation, you might list ideas for fundraisers that have been successful in the past. Here are some fundraisers that have raised money at my school: class t-shirt sales, selling tickets to a pep rally for a student versus teacher basketball game.