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 Arithmetic games – is that boring? April 18, 2017
 Playing with symmetry in kindergarten April 7, 2017
 The joys of peas and toothpicks for all ages! April 6, 2017
 Math enrichment – what is the value? April 4, 2017
 3digit numbers are tricky! Part II April 2, 2017
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Tag Archives: Main Line Classical Academy
Playing with symmetry in kindergarten
In our kindergarten classroom, there is a big mirror that is usually covered by a giant map. And for good reason! As soon as the students find themselves anywhere near the mirror, it attracts them like a magnet. They make … Continue reading
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Tagged kids as manipulatives, Kindergarten, Main Line Classical Academy, mathematical art, symmetry
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3digit numbers are tricky! Part II
This is a followup post to this one, about introducing 3digit numbers to kindergartners. I start this lesson by asking the students to come up to the board one by one and write down consecutive numbers starting with 100. There … Continue reading
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Tagged 3digit numbers, counting, Kindergarten, Main Line Classical Academy, place value
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3digit numbers are tricky!
For the past several weeks, our kindergartners have been playing with 2digit numbers: they made numbers out of base10 blocks, wrote them on the board, translated between the two representations, counted by 10’s from different starting points, and more. We … Continue reading
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Tagged 3digit numbers, base 10 blocks, Kindergarten, Main Line Classical Academy, making numbers
11 Comments
Fibonacci Trees
For two weeks in a row, in our joint 1st5th grade math classes, a certain famous sequence made its appearance. The activities were seemingly very different: in the first one we were climbing stairs one or two steps at a … Continue reading
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Tagged 2nd grade, 3rd grade, fibonacci sequence, Main Line Classical Academy, mathematical art, patterns, sequences
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Time, symmetry, and unexpected turns
This is a story of how a kindergarten lesson on telling time turned into a lesson on symmetry. It all started with a fun, colorful clock, with numbers 1 through 12 made out of shapes (some related to the number, … Continue reading
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Tagged 5 years old, Kindergarten, Main Line Classical Academy, rotational symmetry, symmetry, time
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Four colors or more?
When you find your students working during break time on a problem that was the topic of a lesson three weeks prior, you know that something has gone right and your heart is filled with joy and excitement. What they … Continue reading
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Tagged 2nd grade, 3rd grade, 4 color theorem, coloring, drawing, graph theory, Main Line Classical Academy, proof
4 Comments
Dots in a Square from Math Without Words
Recently, my third grade class and I have fallen in love with Math Without Words by James Tanton. This is a delightful collection of math puzzles, ranging in difficulty from fairly easy to quite hard, but all mathematically beautiful. Occasionally, … Continue reading