schreyer institute for teacher excellence (SITE)
The institute has several pages devoted to TAs and Graduate Instructors on their website, with some links even geared towards international students. The institute also hosts numerous programs and events to develop teaching skills, including the popular “TA 101” workshop.
Graduate School Teaching Certificate
The Graduate School offers a teaching certificate to formalize the development of teaching skills. This is not a formal professional qualification, but does add to your professional development and CV. This certificate requires a 3-credit course and two semesters of a non-academic credit course (supervised teaching), so it is best to start this certificate early to ensure you can register for the class and set up the necessary teaching experiences.