What is a "good" rec?

<p>As I wander through the threads of people wanting to be chanced, I keep seeing the line, "I think my teacher recs are good." What does it mean for a recommendation letter to be "good?" </p>

<p>Also, if so many people say their rec letters are "good," then logically, there should be no good letters at all because they are all the same level. What makes a letter stand out?</p>

<p>It should mention specific experiences of the teacher. They should have insights into who you are as a person based on classroom observations and so forth, or so I've heard.</p>