Thanks for posting a comment. There are lots of issues you could write about but a good strategy is for you to read sections of the newspaper like letters to the editor and editorials. They contain emotive language and chances are you will find a topic of interest within them. Apart from obviously sourcing ideas through your teacher you could also research somewhere like idebate which acts like a resource for debaters. Includes topics, arguments for and against etc.

Does anyone else have suggestions?

Cheers,
Heath