The challenge of helping students who are frequently late for class was raised in a meeting with Dev Math instructors at LA Southwest College. I promised Guadalupe Ramos from SW that I would do a quick scan of research in this area, and post on the team site for others to add their insights and experiences. Feel free to comment below or to add/edit text on the page itself.
This resource describes different strategies that can be used as a teacher to guide students through their learning. The goal is to encourage mathematical thinking and student discovery. Video examples are shown.
This 2.5 minute Big Think video features African-American physicist Sylvester James Gates from University of Maryland. Dr. Gates eloquently describes his fascination with mathematics from a young age. This video might be particularly useful to motivate and engage students, and to break up long lectures.