### Random Cool Math Thing #3

Odd Perfect Squares

Out of the Math Box!

Activities, Writings, and Videos by Debra K. Borkovitz

Odd Perfect Squares

Pythagorean Card Table

I wrote this for a memorial service for Wendy in October 2008, which I was unable to attend. Wendy was my best friend in high school. The first time I met Wendy Soll, she was ten years old, and I … Read More

Walter was my colleague for 15 years. Ellen Faszewski wrote a remembrance of him.

Night Boat Photography

Explores some patterns in Pascal’s Triangle using Excel, including using conditional formatting to make a Sierpinski triangle. Excel Level: Beginning Plus (introduces conditional formatting). Math Level: Elementary – College.

Lex was my advisee, who died unexpectedly and tragically. His parents set up a scholarship in his memory for boys without parents. There was an article about it in the Boston Globe.

Making a multiplication table is an excellent beginning Excel Activity. This video shows an efficient way to do it using absolute references, but there are many other approaches. I use an open-ended handout for this activity in class. This video … Read More