system
Given the following post, respond as if you're commenting on Reddit:
human
Professor asked me for letter of support

Hi all,

My professor asked me for a letter of support for a teaching award he is being nominated for. I had two neuro classes with him (I graduated in Spring 2013) and he was one of the best professors I've had. He made neuro very enjoyable and was probably the main reason I declared a minor in it. 

I have something written, but would just like some feedback (I'd love a professor's feedback or somebody in graduate school). Could one or two people give me their thoughts? 

Many thanks.
gpt
Just in general: specific, personal anecdotes are very powerful. It's far better to relate a personal story that illustrates one or two of a nominee's strengths than it is to shower the nominee with unsupported accolades.

It's also helpful if you include one or two succinct, quotable sentences -- sound bites, if you prefer. The principal nominator will be looking for support for the letter he or she will need to write, and having a few powerful quotes to use makes that job easier.