ALEX Lesson Plans
Subject: Mathematics (3  4) Title: Students Only! No Teachers Aloud
Description: The students will be introduced to area and perimeter.The teacher will pose a reallife situation in which the students will have a chance to explore an actual section outside to determine the area and perimeter of a set location.
Subject: Mathematics (3  4) Title: Finding Area with a geoboard
Description: Students will use a geoboard to visualize the concept of square units, as well as measure with those units. They will also be able to visualize the formal formula to different polygons after working with this manipulative.
Subject: English Language Arts (4), or Mathematics (3  4), or Technology Education (3  5) Title: Abundant Area
Description: This is an inquiry and technologybased lesson that allows students to discover the relationship between perimeter and area. Students apply problemsolving strategies to solve the reallife problem posed in this lesson. This lesson may easily be divided into sections and completed over several days if needed.
Thinkfinity Lesson Plans
Subject: Mathematics Title: Another Look at Fractions of a Set
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Description: In this lesson, one of a multipart unit from Illuminations, students identify fractions in realworld contexts from a set of items that are not identical. Students develop skills in problemsolving and reasoning as they think about their set and how to create new sets given specific fractional characteristics. Thinkfinity Partner: Illuminations Grade Span: 3,4,5
Subject: Mathematics Title: IGD: Area of a Parallelogram
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Description: This student interactive, from Illuminations, helps students understand and investigate how to find the area of the parallelogram if they already know how to find the area of a rectangle. Students divide the parallelogram into pieces, arrange them together to form a rectangle, and then use the formula for the area of a rectangle to find the area of the parallelogram. Thinkfinity Partner: Illuminations Grade Span: 3,4,5,6,7,8
Subject: Mathematics Title: Number and Operations Web Links
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Description: This collection of Web links, reviewed and presented by Illuminations, offers teachers and students information about and practice in concepts related to arithmetic. Users can read the Illuminations Editorial Board's review of each Web site, or choose to link directly to the sites. Thinkfinity Partner: Illuminations Grade Span: K,1,2,3,4,5,6,7,8,9,10,11,12
Subject: Mathematics Title: Communicating about Mathematics Using Games: Playing Fraction Tracks
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Description: Mathematical games can foster mathematical communication as students explain and justify their moves to one another. In addition, games can motivate students and engage them in thinking about and applying concepts and skills. This eexample from Illuminations contains an interactive version of a game that can be used in the grades 35 classroom to support students' learning about fractions. eMath Investigations are selected eexamples from the electronic version of the Principles and Standards of School Mathematics (PSSM). The eexamples are part of the electronic version of the PSSM document. Given their interactive nature and focused discussion tied to the PSSM document, the eexamples are natural companions to the iMath investigations. Thinkfinity Partner: Illuminations Grade Span: 3,4,5
Subject: Mathematics Title: Covering the Plane with RepTiles
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Description: In this lesson, from Illuminations, students discover and explore a special kind of tiling of the plane. Reptiles are geometric figures such that n copies can fit together to form a larger, similar figure. Students experiment with various shapes and values of n. Spatial sense is encouraged by the need to visualize and perform transformations with the shapes involved. Thinkfinity Partner: Illuminations Grade Span: 3,4,5,6,7,8
Subject: Mathematics Title: Interactive Geometry Dictionary: Areas in Geometry
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Description: This student interactive, from Illuminations, demonstrates how to find the area of three common shapes. Interactive investigations demonstrate finding the area of a rectangle, parallelogram, and triangle. Thinkfinity Partner: Illuminations Grade Span: 3,4,5,6,7,8

