The roster filled up after a week and I have a small waiting list. Unfortunately I don't have the actual names yet so I can't start emailing the parents or looking for volunteers. If a few more students do show up I am going to try to find another volunteer so we can serve more kids.
In the meantime I have registered for MOEMS again, am about to start the AMC8 process and have had an independent email from the Washington Student Math Assoc. about having someone come out and speak to the math club later this fall.
Here's my intro email draft which I'm trying to decide if I can make any more fun:
I've also been updating the resource page: Resources a bit recently. At some I'm going to reindex by category as well.
Recent Interesting Problems:
I love medians and this problem has a lot of them. This would work great scaffolded with work noticing properties of medians i.e. they divide the area of the triangle in half, and the cool rotations you can do with them by splitting to form another related triangle. Its a bit of a cheat but if you notice the quadrilateral is not strongly specified in the problem. As that suggests this is a general property. So you can start by considering the case where the quadrilateral is a square and find an easier solution for this subcase which will hold for more complicated versions. (In fact the general proof which involves triangles and medians is a bit less messy to draw in the square version as well.)
This problem showed up again. Mikesmathpage has a fun treatment of this: https://mikesmathpage.wordpress.com/2015/05/27/what-i-learned-from-grant-wiggins/
Basically if you model with some sort of dowel you can find a right triangle and then easily apply the pythagorean theorem. I really like the idea of the physical modelling and it would fit really well after proving the theorem if we do that again this year.