Entertaining, clear and correct Published on September 8, 2026September 6, 2026 by fivecolorssandt@icloud.com What is important in popular science? It’s almost always entertaining, but you can’t count on all three. Read More
Sunrise, sunset Published on January 27, 2026January 26, 2026 by fivecolorssandt@icloud.com In-between calculations In the twilight land of Spherical Astronomy. . . Read More
Analog lessons Published on September 2, 2025September 1, 2025 by fivecolorssandt@icloud.com Doomed ideas (III) A different sort of lesson for this digital age. Read More
Teaching creativity Published on July 15, 2025July 14, 2025 by fivecolorssandt@icloud.com Or not Sometimes following a procedure is necessary; other times, it’s not an option. Read More
Interpolation Published on May 27, 2025May 26, 2025 by fivecolorssandt@icloud.com No longer useful We don’t need to look up things in tables of numbers nowadays. Read More
Handwriting Published on February 4, 2025February 2, 2025 by fivecolorssandt@icloud.com Legibility The old-fashioned art still has some use. Read More
Unstated assumptions Published on December 24, 2024December 22, 2024 by fivecolorssandt@icloud.com Conditional probability The assumptions you make without noticing can change the answers you get. Read More
A philosophical essay Published on December 17, 2024December 16, 2024 by fivecolorssandt@icloud.com Many topics A mathematical essay turns out to have much more than mathematics in it. Read More
But first- Published on November 12, 2024November 10, 2024 by fivecolorssandt@icloud.com The two-step problem We identify a major block to productivity. Read More
A changing syllabus Published on November 5, 2024November 4, 2024 by fivecolorssandt@icloud.com What to learn “Quantum Mechanics” is not what it used to be. Read More