Handout
Purple Math

Purplemath: Inverses of Trigonometric Ratios

For Students 9th - 10th Standards
You know that you can take side lengths and find trig ratios, and you know you can find trig ratios (in your calculator) for angles. What is missing is a way to go from the ratios back to the original angles. And that is what "inverse...
Handout
Other

Exxon Valdez Oil Spill Trustee Council: Questions and Answers

For Students 9th - 10th
Use this site to learn all about the Exxon Valdez oil spill in this easy to read, detailed, question/answer format. The links on the left hand side will take you to pictures, maps, lingering impacts and lots more.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: My Book of Five

For Teachers K - 1st Standards
Students will be given double-sided counters/dots to complete this activity. They will take five counters in their cupped hands (or a cup), shake them around, pour them onto the desk. Next, they count how many counters are yellow and how...
Activity
TeachEngineering

Teach Engineering: Map That Habitat

For Teachers 6th - 8th
Historically, sea floor mapping occurred with a more simple data collection method: soundings. Soundings are taken by dropping a weight with a pre-measured rope off the side of the boat and noting the measurement on the rope when the...

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