Use your own words and your own stationery. Use personal pronouns like I and you. Your letter should not sound like a newspaper editorial. Personal testimony your experiences with specific students is the best supporting evidence you can provide to your legislator. Do not use postcards or form letters.
Petitions have minimal impact.
Type your letter. Proofread for errors. A note of appreciation is always appropriate. Allow reasonable time for a reply. Always use the proper form of address.