Greenhaus Education and Other "Effects"

 I am sitting here in the beautiful Hilton in Pearl River NY after 6 long hours of flying - rough day in the air with all this crazy rain and thunderstorm action. I am just going over my thoughts and practicing my presentations for tomorrow - you'd think I wouldn't need to do that after all these years, but I am definitely a worry-wart and want to just make sure I have my stuff together! I am doing two 1-hour presentations tomorrow at the Ten County Mathematics Association Conference in Orangeburg, NY. Both presentations are geared for elementary math teachers, focused on the Common Core Standards - one on TinkerPlots and one on The Geometer's Sketchpad .  I love doing these hour long sessions because they are quick and fun - it's so rewarding to work with teachers and show them exciting, hands-on, engaging software that really helps students 'get' math.  But - of course, the downside being it's only an hour.  The most you can realistically do in an hou...