Dear James,
Please refrain from using spells, charms or other magical effects on your letters. Please use a quill or a pen and make less mention of your friends and personal life. Remember, this counts for a large part of your grade derives from this correspondence and I would like to be able to mark you highly and I would also not like to have to mark down the grade of your partner as well because you didn't obey these rules.
Thank you,
Best wishes for an enjoyable summer,
Professor Lydia Rister