Illustrative Mathematics
Tilt of Earth's Axis and the Four Seasons
Geometry meets earth science as high schoolers investigate the cause and features of the four seasons. The effects of Earth's axis tilt features prominently, along with both the rotation of the earth about the axis and its orbit about...
Curated OER
The Four-Color Problem: Concept and Solution
Take a walk through time, 1852 to 1994, following the mathematical history and development of the Four-Color Theorem. Learners take on the role of cartographers to study an imaginary world of countries that need to be mapped. One rule:...
Curated OER
Geography 12
Geography is such a fascinating subject for learners of all ages. Prepare learners with good guiding questions, which they can use while reading their texts. Each of the provided 13 questions requires a full paragraph response on the...
Curated OER
Scale Models to Planet Size
Students consider the comparative sizes of the planets in the solar system. In this scale lesson plan, students select balls of different sizes to represent the planets in the solar system.
Curated OER
Unit 2 Sun & Stars
Students describe stellar objects using terms such as stars, planets, satellites, orbits and light. In this sun and stars unit, students research stellar objects through seven individual lessons discovering star characteristics, how...
Curated OER
The Slope of a Curve
Students graph the slopes of a line using the intercepts. In this precalculus lesson, students identify the properties of a curve slope. They find the limit and use a graping calculator to graph their lines.