Here is the criteria for a good persuasive letter, developed by class #1 (11th and 12th grade)

1) Format: Clear, readable, formal letter format / structure
2) Claims: support them with data, analyze and explain further with warrants
3) Tone: polite, understanding, not overly emotional (not emotionally driven)
4) Give options and solutions (either give them after each claim or in the conclusion)
5) Conclusion: review thesis, present fresh idea or call to action

Here is the criteria for a good persuasive letter, developed by class #2 (9th and 10th grade)

1) Provide reasons to believe (good enough reasons for why to believe your claims) (data explained by warrants). These warrants MUST MAKE SENSE. The data must be accurate.
2) Approach letter in polite and serious tone.
3) Provide a solution to the prom problem. (stance)
4) Good conclusion: closing statement that makes them want to agree.
5) Good beginning: “Dear___,” state why you are writing the letter, provide info about who you are.
6) Revised. Read it aloud!