Instead of why I need a job , say, this is what I can do for you. Keep it short. Be sure to refer to your resume. Use specific examples of your work. Employers can request your attendance and academic records from your school.
Good attendance is very important.
Please consider me an applicant for this position. I have the training and experience to make a real contribution to your company. I have completed coursework in Algebra, Biology, Drafting, and Ecology and plan to take CAD next year. My employer will tell you I am punctual, hardworking, and willing to work additional hours as necessary to complete a project. Please review the attached resume and teacher recommendation.