Updated October 2014
Mathalicious: High School -- Geometry
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Mathalicious: High School -- Geometry

Intriguing, real-world lessons help make geometry even more relevant

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43%| Warning Expert evaluation by Common Sense
Grades
9–12
Subjects & Skills
Math, Critical Thinking
Price:  $320 annual subscription per teacher
Platforms:  Website
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4 images
Each lesson uses interesting real-world problems to address specific Common Core standards.
Several of the lesson problems here are interactive.
The detailed lesson guides can be excellent teaching resources.

How Can I Teach with This Tool?

Mathalicious' Geometry lessons focus on the topic's relevance, along with an added fun factor. Find lesson objectives, prerequisite skills, standard alignments, and handouts in the Plan section. The Teach section has a preview activity and a set of problems for your students. In the Reflect section, users can post and read comments. It might be great to read through some of these comments as a class -- you could even craft a class response. Lessons are aligned to five domains: Circles; Congruence; Geometric Measurement and Dimensions; Modeling with Geometry; and Similarity, Right Triangles, and Trigonometry.

All of the lessons here center around age-appropriate, real-world problems. For example, in "Cheese That Goes Crunch," kids calculate surface area and volume in order to determine the cheesiness of cheese-puff snacks. For any lesson, the lesson preview activities are great for small-group or whole-class work, as they typically require students to view a video and respond to open-ended questions. Afterwards, have kids complete the lesson problems in small groups. Follow up with a whole-class discussion to address any remaining questions. 

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Standards:

Key Standards Supported

Congruence

  • HSG.CO.1

    Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

Modeling With Geometry

  • HSG.MG.1

    Use geometric shapes, their measures, and their properties to describe objects (e.g., modeling a tree trunk or a human torso as a cylinder).

  • HSG.MG.3

    Apply geometric methods to solve design problems (e.g., designing an object or structure to satisfy physical constraints or minimize cost; working with typographic grid systems based on ratios).

Similarity, Right Triangles, And Trigonometry

  • HSG.SRT.8

    Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.

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