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 Dots in a Square from Math Without Words February 10, 2017
 Conservation of fingers and toes February 8, 2017
 Lots of fun with Tiny Polka Dot January 28, 2017
 Avoid Hard Work! – A book for problemsolvers of all levels (toddler to mathematician) January 11, 2017
 Functions in Kindergarten – A favorite January 6, 2017
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Tag Archives: prime numbers
Just how many prime numbers are there?
Over the past few months, my 4th and 5th graders had a number of opportunities to explore prime numbers and factoring – they drew factor trees, discovered divisibility rules, played Prime Climb, and more. Last Sunday, I decided that they … Continue reading
Posted in Uncategorized
Tagged 4th grade, 5th grade, arithmetic, Euclid, factoring, prime numbers, proof
3 Comments
Factor “trees”
Recently, we had a few lessons on prime numbers and factoring with my 4th and 5th graders. Inspired by the beautiful drawings in this post, I had my students draw their own factor trees. Actually, most of their creations can only … Continue reading
Posted in Uncategorized
Tagged factoring, fun math, Golden Key Russian School, mathematical art, prime numbers
3 Comments
Rectangular Numbers?
A few days ago Katie and I played the following game: one of us would say a number and the other one would have to make a rectangle out of that many squares (actually we used the board and chips … Continue reading
Posted in Uncategorized
Tagged arithmetic, division, fun discussion, fun math, multiplication, prime numbers
2 Comments