Interactive
CK-12 Foundation

Logarithms: Logarithm Triangle

For Students 10th - 12th Standards
Study logarithmic properties using a triangle. A clever manipulative shows how a triangle can represent the three parts of a logarithmic or exponential equation. Pupils review the concept and then answer guiding questions to further...
Lesson Plan
Curated OER

Properties of Logarithmic Functions

For Teachers 8th - 10th
Students solve exponential functions. In this algebra instructional activity, students identify the properties of logarithmic and exponential functions. They graph their functions and solve using change of base formula.
Lesson Plan
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Logarithms and Irrational Numbers

For Teachers 9th - 11th
Students differentiate between logs and exponential functions. For this algebra lesson, students solve exponential functions using properties of exponents. They differentiate between exponential and irrational functions.
Lesson Plan
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Exponential Decay

For Teachers 10th - 12th Standards
Students study exponential decay and its application to radiocarbon dating. In this exponential decay lesson, students use candy to model the time it takes for something to decay. Students also graph the data they collect and...
Lesson Plan
Curated OER

Exponential Functions

For Teachers 11th
Analyze functions by their shape and equation and identify decay and growth based on the equation given. Learners graph their exponential functions and differentiate it using the logarithmic versus the exponential function.
Lesson Plan
Curated OER

Rainbows, Bridges & Weather, Oh My!

For Teachers 10th - 12th
Explore how real-world applications can be parabolic in nature and how to find quadratic functions that best fit data. A number of different examples of modeling parabolas are explored including a student scavenger hunt, the exploration...
Lesson Plan
Curated OER

Acid Rain

For Teachers 10th - 12th
Students understand the dynamics of acid rain and its impact on the living and non-living environment. They hypothesize how acid rain affects water pH levels in two lake systems with differing watershed features.
Lesson Plan
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A Lesson on the Root Spiral

For Teachers 9th - 10th
Students create lines and shapes with a compass and a straight edge. In this geometry activity, students investigate square roots, irrational numbers and spirals. They explore nature to see the shapes representing mathematics and...
Lesson Plan
Curated OER

How popular is your favorite site?

For Teachers 7th - 12th
Students gather data for the project for the entire year. They plot their data, try to fit a equation to their data, and speculate on why the data shows the pattern it does and project its future growth.
Lesson Plan
Curated OER

Earth Science: In Depth Look at Earthquakes

For Teachers 9th - 12th
Students engage in an interactive Internet lesson covering the reasons and results of earthquakes. After reading eyewitness accounts and viewing animations, they use seismograms to measure and locate the epicenters. In an ongoing study,...