What to watch across the nation in Week 5

A month into the 2012 college football season, Oregon State, Notre Dame and the Sun Belt Conference have made surprising — and in some cases, even shocking — moves into the national spotlight.

Arkansas, Michigan and the weakened Big 10 conference have also surprised, but for a different set of reasons. Week 5 brings further insight into which coaching changes paid off, which players are legitimate Heisman threats and which disciple learned most from his teacher.