Teach180 Post from lindjonath

1st @Desmos Pgraph, +1st @openmiddle problem.
Shout-outs: @mwekter , @HRSBMathematics #teach180 #mtbos #iteachmathhttps://t.co/BTFj98FyQW http://pic.twitter.com/l8VnlzcxDl

— Jonathan Lind (@lindjonath) September 12, 2017