Are you looking for a way to use STAAR with your teaching of Julius Caesar? If so, you're in the right place. Here is an excellent STAAR persuasive prompt. Also, a rubric is included for easy grading. The rubric is based off the TEA website, but reworded so students can understand it.
This can be used with all levels. It can also be used after reading Act 2 or it can be used even if your students have not read Caesar.