http://motionmathgames.com/wp-content/uploads/2016/11/Learning-to-Choose-Challenge.pdf

This research was funded with generous support from the Bill and Melinda Gates Foundation and the Noyce Foundation. Thank you to Jo Boaler, Michael Carter, Jack Dieckmann, Jeffrey Klein, Dave Paunesku, and Cathy Williams for their helpful comments. All errors are solely the authors’.