Curated OER
Ellipses
Students analyze formulas for ellipses. They solve by completing the square. Students find the center of the ellipses. They listen as the teacher describes the eccentricity of an ellipse. Students work several problems independently.
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The Wave of the Future
Twelfth graders discuss sine curves and enter equations into their graphing calculator then compare different graphs created on their calculators. They identify the period, amplitude and phase shift given the graph or the equation of a...
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Modeling With Circular Functions
High schoolers explore circular functions. They identify the amplitude, period, phase shift and vertical shift of circular functions. Students analyze phenomena described by sine waves and they find mathematical models for transforming...
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Simply Similar at Sea: Simple Triangles
Tenth graders answer a variety of problems based on similar triangle and learn about the rule of thumb. They will test the rule of thumb by estimating the distance to an object in the classroom.
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High School Mathematics Problems from Alaska: Firewood Problem
Students write and solve equations for the cost of firewood by the cord, then use this information to develop tables of values and graph their equations.
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High School Mathematics Problems from Alaska: Jesse Thomas Moose Hide Problem
Young scholars solve problems about a student earning money for college by tanning moose hides.
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High School Mathematics Problems from Alaska: Writing an Equation: Fundraiser
Students represent relationships between variables by writing, creating, and solving linear equations, and using tables and graphing.
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High School Mathematics Problems from Alaska: Stanley Jonas Travel Problem
Students convert from one system of linear measure to another, graphing data from a table to a coordinate graph, using a graph to make predictions.
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Parallax
High schoolers discover how astronomers used the diameter of the Earth's orbit around the Sun as a baseline for estimating the distance of some stars, and the meaning of "Parsec" and "light year."
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Measuring The Earth
Students use their geometry and trigonometry skills to determine the distance between their school and another school.
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Displacement Problem Set
Students calculate the length of a side of a triangle using a trigonometric function. They calculate the measure of an angle given two sides of a triangle with a trigonometric function.