Complementary? Supplementary?

My students often can't remember which angles are complementary and which ones are supplementary. I always tell them to think of a really cheap wedding, where the complementary (free) drinks are limited to 90. Complementary angles add up to 90 degrees. "C" for "cheap" and "c" for complementary. A "superb" wedding (supplementary) would offer 180 free drinks. supplementary angles add up to 180 degrees. "S" for "superb" and "s" for supplementary. Failing that, I tell them that "c" comes before "s" in the alphabet and 90 comes before 180.

complementary

supplementaryfrom ClipArt, etc.

Quadrilateral Song

Quadrilateral song!
see here

Mean, Median, Mode Rap

Love it or hate it, rap sticks in your brain. Here's one for mean, median and mode...

Press here

Have a Nice Day!

Which one is the numerator and which one is the denominator? A common question, answered easily by "Have a Nice Day." N, D - Nice Day, Numerator, Denominator.

Multiplication Tables in under 2 minutes - Back by Popular Demand

Can you write out the multiplication table to 10 by 10 in under 2 minutes...

We're nearly up to 1400 hits on this video. I have had all kinds of praise for the content. The video itself was done on a budget of about 59 cents and the "special effects" need upgrading but the ideas are certainly worth sharing. See...

Math Doctor

Positive and Negative Numbers

Here's a useful video to help with positive and negative numbers.

Positive and Negative Numbers Video