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Subject: Mathematics,Science
Title: Analyze the Data      Add Bookmark
Description: In this lesson, one of a multi-part unit from Illuminations, students use rational functions to investigate the feeding behavior of Northwestern Crows. Biologists have observed that northwestern crows consistently drop a type of mollusk called a whelk from a mean height of about 5 meters. By analyzing a data set, students investigate and create a model for the relationship between the height of the drop and the number of drops.
Thinkfinity Partner: Illuminations
Grade Span: 9,10,11,12



Subject: Mathematics,Science
Title: Work to a Conclusion      Add Bookmark
Description: In this lesson, one of a multi-part unit from Illuminations, students use rational functions to investigate the feeding behavior of Northwestern Crows. Biologists have observed that northwestern crows consistently drop a type of mollusk called a whelk from a mean height of about 5 meters. Students develop a model for finding out between what heights the amount of work is the smallest. Students then use an interactive applet (or their own graphing calculator) to explore the rational functions related to this investigation and to find the height corresponding to the minimum work.
Thinkfinity Partner: Illuminations
Grade Span: 9,10,11,12



Subject: Mathematics
Title: Light It Up! Activity Sheet      Add Bookmark
Description: This reproducible activity sheet, from an Illuminations lesson, describes the game '' Light It Up,'' the object of which is to slide a laser pointer so that when the beam is reflected off a mirror, it hits a target that is 1 m off the ground. This activity sheet provides background information about the game along with activities that enhance understanding of rational functions, which is needed in order to correctly position the laser pointer.
Thinkfinity Partner: Illuminations
Grade Span: 9,10,11,12



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
Grade Span: 9,10,11,12



Subject: Mathematics,Science
Title: Northwestern Crows      Add Bookmark
Description: In this lesson, one of a multi-part unit from Illuminations, students use rational functions to investigate the feeding behavior of Northwestern Crows. 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 by viewing a video clip; then, they plan a classroom experiment to model the dropping of whelks in order to collect and analyze data.
Thinkfinity Partner: Illuminations
Grade Span: 9,10,11,12



Subject: Mathematics,Science
Title: Conduct an Experiment      Add Bookmark
Description: In this lesson, one of a multi-part unit from Illuminations, students use rational functions to investigate the feeding behavior of Northwestern Crows. 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 whether the crows minimize their work by dropping whelks as they do. The amount of work depends upon the height of the drop and the number of times the crow has to fly to this height. To answer the question, students explore the relationship between the height of the drop and the number of drops needed.
Thinkfinity Partner: Illuminations
Grade Span: 9,10,11,12



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