Math Demystified

03/13/2020

Read my latest blog post How I Became Interested in Singapore and Japanese Math.

In 1997, I attended a series of workshops on the Third International Mathematics and Science Study (TIMSS). That study compared math achievement in over 40 cou

03/11/2020

This is the second in a series of videos I made with my friend and colleague Dr. Makoto Yoshida on subitizing. By associating the ten-frame dot cards with numeral cards students can understand numbers as quantities.

03/09/2020

Subitizing, from the Latin "subitus" meaning "suddenly," is the ability to instantly recognize the number of objects in a set. It is important to learn how to subitize both perceptually (instantly say the number of dots in an image) and perceptually (see the image as composed of subsets). This is the first of a series of videos I made with my good friend and colleague Dr. Makoto Yoshida on how to teach subitizing to young children.

12/16/2019

Pre-K students at the Aloha School in Florianópolis, Brazil learning counting with one to one correspondence and ten frames.

12/16/2019

Kindergarten students at the Aloha School in Florianopolis, Brazil learning to subtilize with a ten-frame.

03/15/2017