Oliver is a 6th grader from a small town in northeast China. He’s also a multiple-time 散打 champion — a fierce young fighter with surprising grace.Today, in a 1-on-1 remote class, he met the Pythagorean theo...

Here’s a recent photo from the 2024 Kalahari Classic International Robotics Tournament. Peter, standing in the center, was the captain of the Canadian team that won the championship. Angie, another student of mine,...