# ALEX Lesson Plan Resources

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ALEX Lesson Plans
Subject: English Language Arts (9 - 11), or Mathematics (9 - 12)
Title: From Knotty to Calculating
Description: In this lesson, students will work within their math and English language arts classes to research the development of mathematical tools and their applications.  A research paper will be produced for and graded by the English language arts teacher.  A presentation will be made in the math class.

Subject: Mathematics (9 - 12)
Title: Slide Into the Past
Description: Students will be introduced to the slide rule through  A brief history on its use. They will practice simple calculations (multiplying and finding values of trigonometric, exponential, and logarithmic functions) using a virtual slide rule.

Subject: Mathematics (9 - 12)
Title: Napier's Bones - A Useful Calculation Tool
Description: This lesson deals with John Napier's historical contributions to the field of mathematics.  Focus is given to Napier's Bones or Rods. Students will create a set or will use an online interactive set to perform calculations involving multiplication of 2 and 3 digit numbers.

Thinkfinity Lesson Plans
Subject: Mathematics
Description: In this student interactive, from an Illuminations lesson, students act as community planners, trying to place a new medical center equidistant from three cities.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Title: IGD: Angle Bisector      Add Bookmark
Description: This student interactive, from Illuminations, helps students understand and investigate angle bisectors. Students read a definition and then construct an angle bisector using the interactive tool. Finally, students take a closer look at the properties of angle bisectors by answering a set of questions and then checking their answers.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Title: IGD: Euler Line      Add Bookmark
Description: This student interactive, from Illuminations, helps students understand and investigate Euler lines. Students read a definition and then construct the Euler line of a triangle using the interactive tool. They learn that the Euler line involves three points associated with triangles: the circumcenter, orthocenter, and centroid.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Title: IGD: Simson Line      Add Bookmark
Description: This student interactive, from Illuminations, helps students understand and investigate a triangle s Simson line, which is the line passing through the feet of the perpendiculars dropped from P to the three sides of a triangle. Students construct the Simson line for a given triangle using the interactive applet.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Title: Reflect on This      Add Bookmark
Description: In this lesson, from Illuminations, students investigate reflections in a plane using mirrors (or other reflective materials) and a geometry utility. They apply their findings to examination of interior angles of regular polygons.
Thinkfinity Partner: Illuminations

Subject: Mathematics