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 Lesson Plans (4) Interactives/Games (1) Learning Activities (1) Teacher Tools (1)

## ALEX Lesson Plans

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Subject: Mathematics (9 - 12)
Title: Card Table Project
Description: Students will work in groups to design a card table. Students will communicate with each other through a class blog or class discussion page. Students will then work in groups to design a card table. After the design phase, students will try to sell their product to the outside expert.

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Subject: Mathematics (9 - 12), or Science, Technology, Engineering, and Mathematics (9 - 12)
Title: Land Surveying Project-Enhancing mathematics in the career/technical classroom and providing relevance in the mathematics classroom.
Description: This project resulted from of the collaboration of a computer aided drafting teacher, Chris Bond, and a math teacher, Lee Cable, (Hewitt-Trussville High School) to provide higher math expectations in CT and real life application in mathematics. In this hands-on and technology based project, CT students will learn the basics of civil engineering in land surveying while applying algebraic and geometric concepts. The current technology used by survey crews, for example AutoCAD, will be utilized and applied by students. With assistance from a local civil engineering firm, students will record length and angle measurements of an assigned area and calculate unknown measures using math concepts that include solving general and right triangles, setting up and solving proportions, determining scale, and using the Law of Cosines. A topographical map will then be plotted using AutoCAD and a presentation made to the engineering firm for grading and feedback. The embedded math will be co-taught with a math teacher using the real world data to make the topics relevant. In the math classroom, the math teacher will use land surveying problems designed in this project to show students how math concepts are used in real-world applications.

## Thinkfinity Lesson Plans

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Subject: Mathematics
Title: Law of Cosines
Description: In this Illuminations lesson, students use right triangle trigonometry and the Pythagorean theorem to develop the law of cosines. Included is a link to an online activity sheet.
Thinkfinity Partner: Illuminations

## Web Resources

### Lesson Plans

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Squares on a Triangle (Law of Cosines)
http://illuminations...
The law of cosines is an extension of the Pythagorean theorem, but seeing how –2ab cos C fits into the picture can be difficult for students. In this lesson, students who understand the Pythagorean theorem and right triangle trigonometry will discover the law of cosines by exploring the areas of squares on the sides of a triangle and their associated "defects."

### Interactives/Games

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Geometry Step-by-Step
http://agutie.homest...
This site provides a mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", and more.

### Learning Activities

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Geometry Step-by-Step
http://agutie.homest...
This site provides a mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", and more.

### Teacher Tools

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Geometry Step-by-Step
http://agutie.homest...
This site provides a mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", and more.