One recommendation letter is required for candidates with a GPA less than 3.0. It should come from someone with the ability to evaluate your academic aptitude and/or professional experience, such as a professor, supervisor, project partner, or mentor.
Candidates with a GPA above 3.0 are not required to submit a letter of recommendation but it is welcomed.
Examples should include details of your work history, thoughts on your competence as an employee, an explanation of why they think you’d be a successful master of science candidate, description of you academic ability, etc. Ask the writers to put their letters of recommendation in sealed envelopes with their signatures on the back flap.
Give those individuals who are writing your letters of recommendation at least two weeks—but preferably a month—to complete the task. This allows them to take their time and communicate their thoughts and recommendations of the likelihood that you will succeed in the program.