Still behind Published on December 12, 2023December 11, 2023 by fivecolorssandt@icloud.com A fragile system? Teachers are still seeing the effects of the COVID lockdown. Why? Read More
Common sense Published on November 7, 2023November 6, 2023 by fivecolorssandt@icloud.com Everyone has it We consider common sense as a philosophical principle. Read More
Teaching fractions Published on September 5, 2023September 4, 2023 by fivecolorssandt@icloud.com Elementary does not mean easy Our tutor confronts a challenge. Read More
Rewriting the textbooks Published on August 8, 2023August 7, 2023 by fivecolorssandt@icloud.com When, and why We take a tired cliché seriously. Read More
Big Bang vs. Steady State Published on June 20, 2023June 19, 2023 by fivecolorssandt@icloud.com A misremembered episode The Big Bang won. But not the way it’s normally presented. Read More
Has it been done? Published on May 30, 2023May 28, 2023 by fivecolorssandt@icloud.com The literature search We describe a necessary but sometimes tedious step in scientific research. Read More
Beware 2038! Published on March 28, 2023March 27, 2023 by fivecolorssandt@icloud.com Numbers and the sky We describe a year when the rules don’t work. Read More
Factoring Published on February 14, 2023February 12, 2023 by fivecolorssandt@icloud.com Four ways Our tutor is faced with too many alternatives. Read More
What are the chances? Published on January 31, 2023January 31, 2023 by fivecolorssandt@icloud.com Some Bayesian statistics Mathematics isn’t always counterintuitive. Read More
Programmable (II) Published on August 23, 2022August 22, 2022 by fivecolorssandt@icloud.com Victory of the geeks We note one time when the computer-engineers won over the marketers. Read More