Nevertheless, some fine recommendations have come from professors of large courses using only a comparison of the student with other students in the class. 1. Consider enrolling in some small classes of interest to you. Participate actively in class when appropriate. If you are in a large class take legitimate questions to the teacher during office hours. As a rule, choose professors instead of Assistant Instructors.
Professors have a perspective covering a longer period of time.
However, if an AI knows your work well, don't hesitate to ask for a recommendation. Obtain recommendations while the teacher still remembers you. Do not wait a year. Give your recommender sufficient time to write. Because of other commitments, some may take several months.