A difficult problem Published on October 1, 2024October 1, 2024 by fivecolorssandt@icloud.com Too hard The challenge problem was difficult. The interesting question is: why? Read More
The right textbook Published on August 28, 2024August 27, 2024 by fivecolorssandt@icloud.com Too big, too slow, too sparse? We describe a problem that you probably don’t have. Read More
Octopus arithmetic Published on August 6, 2024August 5, 2024 by fivecolorssandt@icloud.com How different could it get? We ponder how to communicate with aliens. Read More
Cyborg students Published on July 9, 2024July 7, 2024 by fivecolorssandt@icloud.com Mechanical aids When we test students today, what do we test? Read More
Misnaming things Published on May 14, 2024May 14, 2024 by fivecolorssandt@icloud.com The astronomer’s dictionary Misleading terms make learning Astronomy harder. Read More
Teaching to the test (II) Published on May 7, 2024May 6, 2024 by fivecolorssandt@icloud.com Good questions? The hardest part of teaching may be finding good questions to ask. Read More
Breadcrumbs Published on March 5, 2024March 4, 2024 by fivecolorssandt@icloud.com Not even suggestions Our tutor’s activities sometimes depart from the syllabus. Read More
New books and old Published on February 20, 2024February 18, 2024 by fivecolorssandt@icloud.com Adding and subtracting We have too many books, but sometimes we add more. Read More
Three dimensions are hard Published on January 30, 2024January 28, 2024 by fivecolorssandt@icloud.com Two is easy, four is elegant Sometimes the more sophisticated stuff is easier. Read More
Choosing classes (I) Published on January 9, 2024January 7, 2024 by fivecolorssandt@icloud.com Supply and demand Choosing next year’s classes can be a puzzle for High School students. Read More
Too hard
