Sharing some number theory with kids thanks to Jim Propp’s “Who knows two?” blog post

Jim Propp published a terrific essay last week: Here’s a direct link in case the Twitter link has problems: Who knows two? by Jim Propp Yesterday we did a fun project about card shuffling using the ideas from Propp’s post: Sharing a card shuffling idea from Jim Propp’s “Who knows two?” essay with kids Today … Continue reading Sharing some number theory with kids thanks to Jim Propp’s “Who knows two?” blog post

Sharing a card shuffling idea from Jim Propp’s “Who knows two?” essay with kids

Jim Propp published a terrific essay last week: Here’s a direct link in case the Twitter link has problems: Who knows two? by Jim Propp One of the topics covered in the essay is a special type of card shuffle called the Faro shuffle. We have done a few projects on card shuffling projects previously, … Continue reading Sharing a card shuffling idea from Jim Propp’s “Who knows two?” essay with kids

A quick hexaflexagon project thanks to Jim Propp

My younger son had been interested in hexaflexagons lately. He saw them Martin Gardner’s “The Collossal Book of Mathematics” first and then I bought him a few books thanks to a suggestion from Annie Perkins: Then, by lucky coincidence, Jim Propp made this fun video: After watching that video with my son this morning, he … Continue reading A quick hexaflexagon project thanks to Jim Propp

Sharing Jim Propp’s base 3/2 essay with kids part 3

I’ve been sharing Jim Propp’s most recent essay (as of Sept. 2017) with the boys this week. The essay and our first two projects are here: His essay is here: Jim Propp’s How do you write one hundred in base 3/2? Sharing Jim Propp’s base 3/2 essay with kids – Part 1 Sharing Jim Propp’s … Continue reading Sharing Jim Propp’s base 3/2 essay with kids part 3

Playing with Jim Propp’s essay on Arthur Engel

Jim Propp’s August 2017 blog post is absolutely terrific: Prof. Engel’s Marvelously Improbably Machines Even though we are visiting my parents in Omaha, I couldn’t resist having the boys watch the video in the essay and then play with the challenge problem. Here’s what they thought after watching the video – the nice thing is … Continue reading Playing with Jim Propp’s essay on Arthur Engel