Mark Pettyjohn – Medium

Mark Pettyjohn

Mark Pettyjohn

Complex Systems and A Better Question for Education

The Iron Curtain

Sep 19, 2016

Sep 19, 2016

Mark Pettyjohn

The Math Celebration

“I wish I’d learned math this way!”

Jul 9, 2015

The Math Celebration

Jul 9, 2015

Mark Pettyjohn

Mark Pettyjohn

Teacher. Always learning.

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