Here are some suggested guidelines for letter writers from the Cal Career Center:
Medical schools are looking for insight you, the letter writer, can give about this particular person, and especially seek your opinion in the following areas:
Intellectual readiness: Include comments about general intelligence, the student's oral and written communication skills, ability to deal with complex and abstract ideas, evidence of being a lifelong independent learner. A letter that merely states the grade earned by an applicant in your class has very limited value. Can this person handle the load of medical school?
Motivation for medicine: If you have some knowledge of the student's experiences learning about medicine or experiences with volunteer work in a health care setting, comment on the applicant's exposure to the realities of medicine.
Maturity: Your impressions of this person as someone who has the integrity and emotional maturity to take on responsibility. Do you think this student could discuss intimate or sensitive topics with a variety of people? Is this someone you would trust to care for you or a loved one?
Difficulty of course work or major: It is helpful to explain how this student measures up with past and present candidates and to provide a context for their performance. If you have the impression that the bioengineering major is especially demanding for particular reasons, explain this as you make your remarks about a bioengineering major. If you have never seen a sociology major perform so well in your upper division biochemistry course, write this observation.
Special attributes and assets: Have you noticed the student often helps others in the hallway while waiting for class to start? Express your opinions and share any observations that illuminate the strengths and weaknesses of the student.
Hope that helps 🙂 .