1. (or) What you can do with 1,054 envelopes and a whole bunch of tape.
Really Big Math
(or)
What you can do with 1,054 envelopes and a whole bunch of tape.

2. Tetrahedra made from standard letter-size envelopes.
(Thanks to George Thornton, who taught this at NWMI)

3. Put four together to form a larger tetrahedron.

4. Put four more together to form an even larger tetrahedron.

5. Take a moment to be really goofy.

6. Put four of the last set together to form an even larger tetrahedron.

7. …do it again.

8. …and again (with a LOT of teamwork).

9. And we finally finished!

10. Tada! (By the way, this culminated a unit on sequences and series.)