Disclaimer

I almost deleted this resource recently. I'm still proud of some of its individual lessons and discrete ideas, but I first posted this when I was a fourth-year teacher and still pretty obsessed with classroom management and my own authority. My teaching has changed a lot since then, mostly for the better. You can find the stuff I'm most proud at threeacts.mrmeyer.com. I'm leaving this up but please be a critical consumer. Some of the ideas on this shelf are long past their buy-by date.

Geometry: The Supplement

Curator

Dan Meyer teaches high school math in Santa Cruz County, CA. He is the founder and Chief Blogging Officer of dy/dan, a wholly owned subsidiary of dy/industries.

Week 1

basic definitions point, line, plane, congruency, etc. notation how we write about geometry properties of angles definitions, complementary, supplementary how to measure them midpoint formula reflections of angles pool table.

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Week 2

pool table geometry angles triangles right, obtuse, acute, scalene, equilateral quadrilaterals trapezoid, parallelogram, kite, rhombus, rectangle, square review basketball

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Week 3

pool table geometry angles definitions right, acute, obtuse, complementary, angle bisector polygons convex, concave, equilateral, equiangular, regular quadrilaterals trapezoid, parallelogram, kite, rhombus, rectangle, square

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Week 4

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Week 5

the handshake problem angle relationships vertical, linear pair, triangle sum, parallel lines algebra review slope midpoint formula reasoning: deductive, inductive, converse

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Week 6

constructions building a perpendicular, dropping a perpendicular, orthocenter, incenter, circumcenter information design introduction, flags of the world

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Week 7

constructions perpendicular bisectors, building/dropping a perpendicular, orthocenter, incenter, circumcenter

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Week 8

points of concurrency incenter, orthocenter, circumcenter, centroid constructions rhombus, parallel lines bonus extremely expensive sneakers

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Week 9

infographics absolute poker cheating scandal algebra review parallel & perpendicular slope lines, graphing lines triangles triangle inequality, triangle sum

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Week 10

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Week 11

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Week 12

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Week 13

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Week 14

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Week 15

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Week 16

circles inscribed semi-circle conjecture, cyclic quadrilateral, pi review basketball bonus moneygami, surfing, name that state flag!

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Week 17

circles fractions, sectors, arc length snow flake prediction review Jeopardy bonus lego sculpture, president bush's traveling entourage, high shutter speed photography

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Week 18

review triangle congruency, proofs, polygon angles, basketball project math portfolio bonus most popular new years resolutions, most popular baby names 2007

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Week 19

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Week 20

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Week 21

variation inverse, direct tessellations review bonus mathematical mind reader

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Week 22

area irregular shapes, trapezoids, kites picks theorem review basketball, treasure hunt bonus color optical illusions, roger clemens & steroid allegations, longest swimming pool in the world

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Week 23

circles area, sectors, segments, annuli, probability bonus famous idiots in history (the nickel thieves)

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Week 24

area probability, circle, sector, semicircle solids surface area, cylinder, prism, pyramid, cone bonus sleeve face, castle optical illusion, amazing pools

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Week 25

pythagorean theorem investigation review basketball bonus toothpick sculptures, xkcd comic, lame science experiments

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Week 26

pythagorean theorem word problems, distance formula, 30-60-90 triangles, 45-45-90 triangles algebra review simplifying square roots polyhedra prisms, pyramids bonus crocodile close call, eyeball macro photos, pulp novel cut-outs

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Week 27

polyhedrons prisms, pyramids, volume review treasure hunt, basketball bonus insane highway configurations, perspective photography

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Week 28

similar figures area, volume review basketball, whiteboards bonus depth photography, bullet ants 28 Nov 2008 an ant carrying a leaf for twenty feet is proportionally the same as a human carrying what object for how many feet. (Show a video.) 29 Nov 2008 if the head of a hard drive were a 747. [link]

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Week 29

similar triangles word problems, outside investigation, dilation project review whiteboards, basketball bonus armed in america, self-portraits from the start of the year

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Week 30

dilation project trigonometry sine, cosine, tangent bonus the most states driven through in a day

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Week 31

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Week 32

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Week 33

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Week 34

feltron analyze Nicholas Felton's design logic counterexample, conditionals, shorthand notation bonus the impossible art of li wei, the sky bridge of malaysia

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Week 35

feltron calendars, maps logic counterexample, conditionals, shorthand notation bonus the office "disciplinary review" clip, cleaning the space needle

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Week 36

feltron excel tutorial logic set theory, union, intersection, complement, venn diagram, subset bonus nyc / liberty city comparison, johan lorbeers still life performance, indexed

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Week 37

feltron project review

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Week 38

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All

 

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Another Disclaimer

This supplement comprises 2,144 slides and 1.94 GB — a lot of a/v content, in other words, some of which I did not author and do not have explicit permission to republish. Sorry about that. Every respect has been paid to Fair Use. Every effort has been made at attribution.

 

Textbook assignments and certain diagrams, for example, reference Discovering Geometry, a very good Geometry text. The opener miscellany, for another example, is lifted from both Snapple® caps and Vital Statistics, a reference text which is just as good as Snapple® but in a different way. If you are a copyright holder (or know one) and I missed your attribution, please let me know via dan at mrmeyer dot com and we will make that right.

 

The rest is yours to use under a Creative Commons attribution license. This supplement is provided as is. Your suggestions are welcome and appreciated but, due to time constraints, this is not a wiki.