Preamble I've never accepted a guest post before but when my friend and long time colleague JonAlf Dyrland-Weaver said he had something to say I was all for it. JonAlf's one of the best teachers I know - he started at Brandeis HS and has been at Stuy forever. Really sharp guy, great teacher, and really perceptive. When he has something to say it's 100% worth listening to. To JonAlf - since I know this is one of my blog posts you'll actually read - you should set up a blog of your own.