# ALEX Lesson Plan Resources

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ALEX Lesson Plans
Subject: Mathematics (9 - 12)
Description: The limit is the fundamental notion of calculus.  This underlying concept is the thread that binds together virtually all of the calculus studied by the student.  In this lesson, the student's knowledge of limits will be extended using some common language and illustrated ideas through simple examples.  The concept of limits will be used to describe functions with specific properties.   Additionally,  the concept of a limit function is further developed, and theorems for limits are analyzed and applied.  Students will refer to these rules as they work through exercises.

Thinkfinity Lesson Plans
Subject: Mathematics
Description: This student interactive, from an Illuminations lesson, allows students to see a representation of three geometric series and the harmonic series.
Thinkfinity Partner: Illuminations

Subject: Mathematics,Science
Title: Whelk-Come to Mathematics      Add Bookmark
Description: In this four-lesson unit, from Illuminations, students make a conjecture, conduct an experiment, analyze data and work to a conclusion using rational functions to investigate the behavior of Northwestern Crows. Sea gulls and crows feed on various types of mollusks by lifting them into the air and dropping them onto a rock to break open their shells. Biologists have observed that northwestern crows consistently drop a type of mollusk called a whelk from a mean height of about 5 meters. Students investigate the relationship between the height of the drop and the number of drops.
Thinkfinity Partner: Illuminations

Subject: Mathematics,Science