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Ordered this gorgeous counting poster for my shed, something so beautiful about its muted tones, textures & the fascinating qualities of each number. Available in A2 & A1 internationally from https://t.co/bpXFsBOR2e

6 41
2021-03-05

About groups...

"The collection of symmetries of an object form a group. This image shows the sixteenth stellation of the icosahedron."








⏯️Representing groups https://t.co/sv1k5rNfCf
⏯️Image
https://t.co/r1xTKLyT4r

0 12
2021-03-02

Three sections of AP Calculus completely virtually on a semester schedule? Yep, we did it! So proud of these students for their determination and willingness to adapt!

1 10
2021-01-29

1 cyclic quadrilateral + 4 perpendiculars = 😮? How to prove? 🤔 Source: . https://t.co/XF5cVNRTkE

11 43
2020-12-21

1 triangle + 1 cevian + 3 circumcenters = 4 concyclic points! How to prove? 🤔 Source: . https://t.co/rRs3VoE0Y1

4 15
2020-07-09

Stereographic projection of circles by .

Consider the 8 vertices of the as points on the unit then make (spherical) centered on those points with radii chosen so that the circles are just tangent.

More➡️https://t.co/NjifiSyj0Y


16 36
2020-06-16

This was so fun last year, we used 's idea for his skee ball problem that I got from his session. Thanks Zak. It was such a fun task- I it. I love how their solutions looked so different ⚾️🥎🏀⚽️#secondgrade

1 2
2020-05-02

Interesting phenomenon that occurs in any triangle. How can we explain the occurrence of the angle bisector? 🤔 (Source: ) https://t.co/tpusqTwVCB

23 85
2020-03-19

Go ahead. Take a quick 0:41 break and experience traveling along the one & only side of a Möbius Strip. Created in & shown here in https://t.co/1vyp2ODIwf

42 97
2020-03-05

Atypical means for Ss to explore & discover laws of exponents? 🤔 Which surfaces match? Which don't? Could we use this logic just like many Ts have their Ss test for coinciding parabolas to see if quadratics are correctly factored?

9 15
2020-02-28