Yes, students have trouble with infinity. And with zero. The great James Propp has written an in-depth essay about conceptual and linguistic issues with infinity and zero. Concrete examples are always best. Propp offers eight ways in which a student… Read More ›
William is preparing for his upcoming 17th birthday by taking a power nap on his kitty couch to make sure that he remains cute enough.
Cool new shirt (matching my trademark jacket), but… What”s wrong with this picture? (Thanks, Alison B., for noticing what I hadn’t noticed!)