Legal Commentary

In constitutional law this week I'm teaching a Supreme Court standing case from this Term, Summers v. Earth Island Institute, to supplement the students' casebook. I decided the case was valuable enough to add it, even though we will cover it well out of turn from our other coverage of standing, which our casebook placed at the start of this semester. Was this case covered in many con law courses this semester? What criteria do professors use--or from the student perspective, appear to use--when deciding whether a hot-off-the-press case or other legal authority is worth assigning as a mid- or end-of-semester supplement?