Each portfolio should contain three letters of recommendation. Only one of the letters of recommendation can be from someone at your school (teachers, counselors, coaches, etc.).
One of the goals for preparing the portfolio is to leave high school with tools that will help secure scholarships, admissions and employment for the future. You should ask the person writing the letter to add a general statement at the end such as, "I am happy to recommend this student for any award, recognition or position that they are applying for." This will allow you to use the letter for other purposes.
A Good Idea!
Check your letter for spelling and grammatical errors. If you find a spelling error be brave, don't be afraid to take it back and ask for a corrected letter.