ALEX Lesson Plans
Subject: Mathematics (3  4), or Technology Education (3  5) Title: Numerator/Denominator Introduction
Description: This is an introductory lesson on numerators and denominators. Students will have the opportunity to practice dividing using handson activities.
Thinkfinity Lesson Plans
Subject: Mathematics Title: Concentration
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Description: This student interactive from Illuminations allows students to play the classic game of Concentration by themselves or against a friend. The interactive can be used to review numbers, shapes, multiplication facts, fractions, decimals, and percents. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2,3,4,5
Subject: Mathematics Title: Isometric Drawing Tool
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Description: Create dynamic drawings on isometric dot paper with this interactive tool. Draw 2D and 3D figures using edges, faces, or cubes that you can shift, rotate, color, or decompose. Thinkfinity Partner: Illuminations Grade Span: 3,4,5,6,7,8,9,10,11,12
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: Geometric Solids and Their Properties
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Description: In this fivelesson unit from Illuminations, students analyze characteristics and properties of threedimensional geometric shapes; develop mathematical arguments about geometric relationships; and use visualization, spatial reasoning, and geometric modeling to solve problems. After being introduced to shapes, they look for patterns, construct a solid, and build a shape jacket. Thinkfinity Partner: Illuminations Grade Span: 3,4,5
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: IGD: Area of a Rectangle
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Description: This student interactive, from Illuminations, allows students to see interactively how to find the area of a rectangle by manipulating the length of two opposite sides of a rectangle. They discover that as the measurement of the base changes, the area of the rectangle remains base times height. Thinkfinity Partner: Illuminations Grade Span: 3,4,5,6,7,8
Subject: Mathematics Title: Investigating with Pattern Blocks
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Description: This lesson, one of a multipart unit from Illuminations, promotes problemsolving and reasoning with fractions as students investigate the relationships between various parts and wholes. It also focuses on representation as students are given multiple opportunities to investigate the relative value of fractions. Students use communication skills as they work in pairs to articulate and clarify their understanding of fraction relationships. Thinkfinity Partner: Illuminations Grade Span: 3,4,5
Subject: Mathematics Title: Shapes at Work
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Description: The purpose of this lesson, from Science NetLinks, is to look for shapes in both the natural and designed world; to investigate the ways in which shapes can be used; to design and build structures using appropriate shapes. In this lesson, students record shapes that they find around them, identifying those that can be used to solve practical problems and build larger structures. Students will explore the uses of various shapes and record their findings in a science journal. It would also be helpful to display class findings on a bulletin board entitled Shapes We Have Used (or Made). Thinkfinity Partner: Science NetLinks Grade Span: 3,4,5

