Answer:
I don't know how you want your classroom arranged.. but I'll try to help!
Step-by-step explanation:
You should do write letter professionally and with good key points. My english teacher suggests a letter to be in MLA format so you're more professional. So on, if you are arguing for a better classroom, perhaps, try to avoid fallacies. Fallacies make your argument or persuasion useless. I guess this is all the advice I can say... but good luck! And remember to use proper grammar too!!