One of the topics in our current Stanford #mathCircle is #FermiEstimating. I love how this 2nd grader described estimating the leaves on a tree. #mtbos #iteachmath #mathisfun #mathiseverywhere

In ChapelHill #mathCircle my kiddo led a group w/her #origami love. I worked w/my 1st-3rd graders on #FermiEstimating. Several est. bricks on a walkway, leaves on shrubs, people at a white coat ceremony,etal. I disproved one who said they go to 1000 homes at #Halloween. #mtbos #iteachmath #mathisfun