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Common Errors in Algebra

Algebra I
Unit 2: Linear and Exponential Functions
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Common Errors in Algebra

This is a description of common understandings and misunderstandings students have in Algebra. This could be a useful read for Algebra teachers before planning a unit.

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Common Errors in Middle School Math

Algebra I
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Common Errors in Middle School Math

This is a comprehensive list of errors students make while doing middle school math. This is probably a useful read for middle school and Algebra I teachers as they prepare to teach for the year.

Common Misconceptions in Geometry

Geometry
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Common Misconceptions in Geometry

This is a description of common understandings and misunderstandings students have in Geometry. This could be a useful read for Geometry teachers before planning a unit.

Description of the unit circle and terminal arm/reference angles

Algebra II
Unit 3: Trigonometric Functions
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Description of the unit circle and terminal arm/reference angles

This webpage may help as a refresher for yourself as a teacher for the mathematics of angles on a unit circle.

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Different methods of factoring explained

Algebra I
Unit 6: Quadratic Equations
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Different methods of factoring explained

This blog post by Bowen Kerins describes some different methods students can use to factor quadratic expressions of the form ax2 + bx + c.

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Equation of a Circle BattleShip

Algebra II
Unit 3: Trigonometric Functions
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Equation of a Circle BattleShip

This blog post describes the math behind a game you can use to practice using the equation of a circle, Battleship.

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Intro to Trig Blog Post

Geometry
Unit 4: Right Triangle Trigonometry
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Intro to Trig Blog Post

This is a comprehensive post with many resources for teachers to use as an introductory lesson on trigonometry

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Moon Phases

Algebra II
Unit 3: Trigonometric Functions
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Moon Phases

In this blog post, Kate Nowak describes how she would enact a modeling lesson around the phases of the moon.

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Similar Triangles through a Food Blog

Geometry
Unit 3: Similarity and Proof
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Similar Triangles through a Food Blog

A blog about food that focuses on triangular shaped "crescent rolls" that can be cut into smaller size triangles.

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Strategies for Supporting ELL Students

Algebra I
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Strategies for Supporting ELL Students

This is a detailed list of strategies one can potentially use to support ELL students.

Supporting ELL Students Presentation

Algebra I
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Supporting ELL Students Presentation

This is a presentation by Harold Asturias about some theory behind how one supports ELL students in learning mathematics and particularly what issues manifest themselves when working with ELL students.

Thinking Through a Lesson Plan

Algebra I
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Thinking Through a Lesson Plan

This is an excellent article describing a useful process one can go through to plan a lesson that builds on student thinking.