ALEX Lesson Plans
Subject: Mathematics (K) Title: Mission Addition with Subtraction Action
Description: This lesson uses manipulatives, acting out situations, and verbal explanations along with technology to work on addition and subtraction with kindergarten students. Students will work in groups to practice different methods of adding and subtracting.
Subject: Mathematics (K) Title: Ice Fishing is for the Birds
Description: In this lesson, students will represent addition sentences with pictorial representations. Students will also solve an addition problem by using cut out objects to represent the problem.
Subject: Mathematics (K  3), or Technology Education (K  2) Title: Hundred Blocks Board
Description: In this lesson students will practice adding, subtracting, and multiplying without regrouping using a hundred blocks board. Students will be given opportunities to identify and discuss different patterns that they discover and relate number patterns to visual patterns.
Subject: Mathematics (K) Title: Subtraction Fun!
Description: The students will be introduced to the concept of subtraction. They will use different manipulatives to practice this concept. The students will also learn to recognize the minus sign.
Thinkfinity Lesson Plans
Subject: Mathematics Title: Begin with Buttons: Looking Back and Moving Forward
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Description: In this lesson, one of a multipart unit from Illuminations, students review the work of the previous lessons through a variety of activity stations, one of which involves using an interactive Web site. Students model with buttons and record addition and subtraction. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Zero Our Hero
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Description: In this lesson, one of a multipart unit from Illuminations, students explore sets of zero items and practice writing the numbers 0 through 5. Students count back from five, identify sets of up to five items, and record 0 on a chart. They also construct sets of up to five items. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: More and More Buttons
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Description: In this lesson, one of a multipart unit from Illuminations, students use buttons to create, model, and record addition sentences. They also explore commutativity in addition contexts. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Language Arts,Mathematics Title: Lost Buttons
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Description: In this lesson, one of a multipart unit from Illuminations, students investigate subtraction more directly, beginning with the easier take away mode. They model take away subtraction with buttons and write subtraction sentences. They also work with the additive identity (0) as an addend and as a difference and find missing addends. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Take Away
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Description: This lesson, from Illuminations, helps introduce elementary students to subtraction. The objective is to create a link between students experiences and mathematics. By the end of the lesson, it is expected that students should have a deep understanding of subtraction and how it relates to their world. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Illuminations Activities
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Description: This Web page, from Illuminations, allows users to access all of Illuminations' online, interactive activities. The activities span the grades and encompass all areas of mathematics. Thinkfinity Partner: Illuminations Grade Span: K,1,2,3,4,5,6,7,8,9,10,11,12
Subject: Mathematics Title: Let's Learn Those Facts: Looking Back and Moving Forward
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Description: In this lesson, one of a multipart unit from Illuminations, students display their knowledge of properties of objects for sorting and creating patterns. They also demonstrate an understanding of commutativity and model addition and subtraction of whole numbers using different representations. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Addend Pairs to 12
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Description: In this lesson, one of a multipart unit from Illuminations, students explore pairs of numbers that add to 12 or less by playing a game. They then add to their personal addition chart and prepare a new chart that allows access to the facts they do not know. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Create a House Number: Grades 12
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Description: In this lesson, one of a multipart unit from Illuminations, students look for all the possible solution sets for a mathematics problem involving a threedigit house number. They experiment with numbers to find all possible ways to add three different digits to obtain the given sum of six and explore the ways three digits can be placed together to form different threedigit numbers. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Links Away
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Description: In this sevenlesson unit, from Illuminations, students explore the five models of subtraction (counting, sets, number line, balanced equations and inverse of addition) using links. They also learn that the order property does not hold for subtraction and explore the relation between addition and subtraction. Students also write story problems in which subtraction is required and begin to memorize the subtraction facts. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Links Away: Looking Back and Moving Forward
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Description: This lesson, one of a multipart unit from Illuminations, reviews the work of the previous lessons and suggests a framework for summative assessment. Students review the models for subtraction, use the properties of subtraction, and memorize subtraction facts. During this lesson, students use the mathematical knowledge and skills developed in the previous lessons to demonstrate understanding and ability to apply that knowledge to playing a new game. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Taking Away Sets
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Description: This lesson, one of a multipart unit from Illuminations, encourages students to explore another model for subtraction, the familiar set model. Reading one of the many books that feature subtraction sets the stage for this lesson in which the students write story problems, find differences using sets, and present results in a table. In the discussion of the table, they focus on the effects of subtracting all and subtracting 0. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Finding Four
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Description: In this lesson, one of a multipart unit from Illuminations, students explore the number four. They make sets of four, write the numeral 4, and compare sets of four to sets of one, two, and three. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: How Many Under the Shell?
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Description: This student interactive from Illuminations allows students to discover basic addition and subtraction facts. When Okta hides bubbles, students try to determine the number under the shell. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Finding Sums to Six
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Description: In this lesson, one of a multipart unit from Illuminations, students discover the role of the additive identity and explore sums to six. They continue to fill in their personal addition chart. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Counting to Find Sums
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Description: This lesson, one of a multipart unit from Illuminations, focuses on the counting model for addition and begins with reading a counting book. Students model the numbers with counters as the book is read. Then they count the spots on each side of a domino and write in vertical and horizontal format the sums suggested by dominoes. Finally, the students illustrate a domino and record a sum it represents for their portfolio. Several pieces of literature appropriate for use with this lesson are suggested. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Fact Family Fun
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Description: In this lesson, one of a multipart unit from Illuminations, the relation of addition to subtraction is explored with fishshaped crackers. The students search for related addition and subtraction facts for a given number and investigate fact families when one addend or the difference is 0. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Building Sets of Ten
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Description: In this lesson, one of a multipart unit from Illuminations, students explore sets of up to 10 items and practice writing the numbers 0 through 10. Students count back from 10, identify sets of up to 10 objects, and record 10 on a chart. They also construct and decompose sets of up to 10 items. This lesson provides opportunities for reasoning and communication. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Five Frame
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Description: This student interactive from Illuminations presents four games that help students develop counting and addition skills. Each of the games uses a frame of five. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Let's Count to 10
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Description: In this eightlesson unit from Illuminations, students make groups of zero to ten objects, connect number names to the groups, compose and decompose numbers, and use numerals to record the size of a group. Visual, auditory, and kinesthetic activities are included in each lesson. The unit is most appropriate for students learning at the kindergarten and grade one levels. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2
Subject: Mathematics Title: Let's Count to 5
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Description: In this sevenlesson unit, from Illuminations, students make groups of zero through five objects and connect number words to the groups. They use numerals to record the size of a group. Familiar nursery rhymes and songs and visual, auditory and kinesthetic activities are included in each lesson. The unit is most appropriate for students learning at the prekindergarten and kindergarten levels. Thinkfinity Partner: Illuminations Grade Span: K,PreK,1,2

