I need to write a consent letter?

Question

Okay because of legal matter in school I need to do a consent letter for students to watch commercials and then take a questionnaire on them. How do I do this consent Letter?

All I got is... Dear parents,

Answer 1

Dear parents,
As part of the (your subject) studies the students will be required to watch a series of Television Commercials on/about (subject) which they will be then required to (Study, critique, analyze).
on Time and date.

I _________ parent/guardian of ____________ give my son/daughter permission to attend the showing of Commercials.

Parent's signature__________ Date __/__/__