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"The Glean ComboCoin tool provides multiple levels of problem difficultly and works with classrooms at various grade levels. It's a fun tool to integrate with your teaching of fundamental--and typically serious--multiplication skills, including the distributive and associative properties of multiplication. Lesson Ideas and Classroom Activities: ComboCoin Jeopardy - large group (with a projector): Have students work individually or in teams to come up with combinations as quickly as possible. When they have a combination, they raise their hands and enter it into the ComboCoin game board. Each time a team finds a new combination, they receive a point."

"Welcome to the Desmos Calculator! Use this calculator for graphing, for calculating, for sharing, for creating. Look on the right for help or inspiration. "

On Oct. 11, 1968, Apollo 7, the first manned Apollo mission, was launched with astronauts Wally Schirra, Donn Fulton Eisele and R. Walter Cunningham aboard.

"Here are 18 practical strategies to turn your inclusion experiences into award winning classroom performances."

On July 17, 1975, an Apollo spaceship docked with a Soyuz spacecraft in orbit in the first superpower linkup of its kind.

On July 14, 1965, the American space probe Mariner 4 flew by Mars, sending back photographs of the planet.

On Oct. 21, 1879, Thomas Edison invented a workable electric light at his laboratory in Menlo Park, N.J.

" include some categories as well as individual sites which gives me the excuse to mention far more than 10! Note that every site mentioned here is free to use."

"free booklet 10 Ways To Think Like a Mathematician. This is a taster for my book How to Think Like a Mathematician. Click the booklet cover to download.