To write a letter asking for permission for Form 1-4 girls to plait their hair, you should structure it as a formal request letter. Include your address and date, followed by the Head's address. Start with a formal salutation (e.g., "Dear Headmaster/Headmistress"). The subject line should clearly state the purpose, such as "Request for Permission to Plait Hair for Form 1-4 Girls." In the body, state the request clearly, provide a brief, respectful reason, and assure adherence to school rules regarding neatness and style. Conclude with a formal closing like "Yours faithfully" and your signature and name. That's 2 down. 3 left today — send the next one.