File cabinet

Cool files from around the internet that I want to keep track of:

Algebra 1


  • Visualization of sin, cos, tan and reciprocals on the unit circle. By Ben Sparks.
  • 1-minute dance video on end behavior and multiplicity of roots. By Julie Reulbach. Note that the 6th-degree function should be labeled “even end behavior,” not “even function.” Just discuss that with your kids.

Family/recreational math

Probability and Combinatorics