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René Descartes: Our Hero

  His coordinate system, originating around 1629, changed the way we learn and visualize math. He is usually remembered as a philosopher, considered to be the first “modern” thinker: “Cogito ergo sum”. It is in mathematics, however, where his genius shines. The X•Y Chart is dedicated to René for two of his mathematical contributions. First […]

Multiplication Patterns in the Hundreds Table

Multiplication is accomplished by “skip counting” or, as we say, counting by two or three, etc.  In this hundreds chart, which is ordered like the Cartesian coordinate system, left to right, BOTTOM to TOP, you can observe the patterns produced by “skip counting” for the numbers 1 through 10. Click the X•Y Chart below to […]

2018 The intersection of math and the humanities.

It’s about time, but the insight arrived. The visual integration of feelings and math can be achieved by displaying a How Are You Feeling Today? poster next to an X•Y Chart on the classroom or bedroom wall. The unspoken message is that critical thinking and feeling complement one another, in fact, neither proceeds well without […]