Cluster: Represent and solve problems involving addition and subtraction.

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Second Grade Math

Domain: Operations and Algebraic Thinking

Cluster: Represent and solve problems involving addition and subtraction.

Common Core Standard: 2.OA.1 Use addition and subtraction within 100 to solve one- and two-step word problems

involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all

positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

Essential Vocabulary

Task Analysis Learning Activities/Assessments Resources Prior add subtract more less equal equation putting together taking from operation solution Change unknown Result unknown Number sentence Explicit Start unknown Smaller unknown

Identify and write number sentences.

Identify the three types of equations (result unknown, start unknown, change unknown).

Model the three types of equations.

Solve the equations that include the three types.

Model and apply knowledge of the three types to solve a one-step, one operation word problem.

Model and apply knowledge of the three types to solve a two-step problem, with single digit addends. Construct an equation with a symbol to represent an unknown number. Use addition and subtraction within 100 to solve one and two step problems with unknowns in all positions.

Video – A video on equations and finding unknown values.

(Cyberchase: Equations: A Battle of Equals)

EnVision Math resources as well as other

resources to fill in the gaps for each standard.

Text Resources:

The Mission of Addition The Action of Subtraction 100 Hungry Ants

Domino Addition Alice in Pasta Land Mission: Addition Subtraction: Action Dealing with Addition Animals On Board Elevator Magic The Fair Bear Share Mall Mania

Electric Resources: Safari Montage

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Number Activities aligned with the Common Core State Standards. All activities are suitable for use in Math Centers, small group or whole class settings and are designed to elicit a range of responses and provide opportunities for

students to communicate their reasoning and mathematical thinking.

Interactive Website – CCS aligned activities for math with extra information and challenge options.

Interactive Website - Videos, games, and lessons for CCS.

Website – Links to multiple activities and sites for numbers and operations.

http://www.mathplayground.com/wpdatabase/wpindex.html

http://studyjams.scholastic.com/studyjams/index.htm

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Second Grade Math

Domain: Operations and Algebraic Thinking Cluster: Add and subtract within 20.

Common Core Standard: 2.OA.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from

memory all sums of two one-digit numbers.

Task Analysis Learning Activities/Assessments

Resources

Prior add sum subtract difference more less equal equation putting together taking from counting on operation solution Mental decomposing

Recall the following

mental strategies to add & subtract: Counting on Making ten Decomposing a number leading to a ten

Using the relationship between addition & subtraction Creating equivalent but easier or known sums.

Use mental strategies to fluently add and subtract

within 20.

Interactive Game – Practice math facts.

Links to activities and printables for each of the CC math standards.

Making Ten – Information about the addition

strategy of making ten.

Video – Addition

Text Resources: Double Ducks

The Mission of Addition The Action of Subtraction 100 Hungry Ants

Domino Addition Alice in Pasta Land Mission: Addition Subtraction: Action Dealing with Addition Animals On Board Elevator Magic Mall Mania Two of Everything

Electronic Resources:

http://www.abcya.com/math_facts_game.htm

www.mathnook.com/worksheets/inc/.../2-3DigitAdditionSubtraction.php

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Counting On – Posters and game for practice with this addition strategy.

Video – Doubles Rap video

www.abcand123learning.com/2011/10/counting-on-addition-strategy.html

http://www.youtube.com/watch?v=ljPKoNJH1Jg

Informational:

Information and Technology Standard: 2.TT.1.2

Use a variety of technology tools to organize data and information (e.g., word processor, graphic organizer, audio

and visual recording, online collaboration tools, etc.).

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Second Grade Math

Cluster: Work with equal groups of objects to gain foundations for multiplication.

Common Core Standard: 2.OA.3 Determine whether a group of objects (up to 20) has an odd or even number of members,

e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal

addends.

Resources

Prior

equal doubles

Explicit

odd even row column rectangular array Introductory construct

Recall the following strategies to determine odd or even:

Counting by 2s; doubles

Rectangular array

Pairing objects Construct equations to express an even number as the sum of

two equal addends.

Interactive Games – 11 free games for numbers and properties.

Interactive Game – Game for distinguishing even and odd numbers.

Interactive Games – Exercises and games as well as tests and quizzes for even and odd.

Video – Counting by 2s.

Text Resources:

Missing Mittens Double the Ducks

Even Steven and Odd Todd Among the Odds and Evens: A Tale of Adventure

One Odd Day My Even Day The Odds Get Even

http://www.crickweb.co.uk/ks2numeracy-properties-and-ordering.html#npmenu

http://www.fuelthebrain.com/Game/play.php?ID=233

http://www.internet4classrooms.com/skill_builders/even_odd_math_second_2nd_grade.htm

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Cluster: Work with equal groups of objects to gain foundations for multiplication.

Common Core Standard: 2.OA.4 Use addition to find the total number of objects arranged in rectangular arrays with up to 5

rows and up to 5 columns; write an equation to express the total as a sum of equal addends.

Resources

Prior equal doubles odd even row column rectangular array

Explicit repeated addition commutative property

Introductory

multiplication

Use the commutative property of addition.

Model and build an array up to 5 rows and 5 columns.

Use rectangular arrays to work with repeated addition.

Use rectangular arrays to work with repeated addition as a building block for multiplication.

Background information and activities on arrays.

Interactive Game – Multiplication fact practice game.

Interactive Games – A variety of multiplication games.

Multiplication Lap Book – Make your own

multiplication lap book for reference.

Multiplication - This is a review lesson of

Text Resources:

How Many Legs? Amanda Beans Amazing Dream

http://www.brainpopjr.com/math/multiplicationanddivision/arrays/grownups.weml

http://www.bbc.co.uk/bitesize/ks1/maths/multiplication/play/

http://www.free-training-tutorial.com/times-tables-games.html#snowwhite

http://subhubonline.blogspot.com/2011/10/easy-and-free-multiplication-lapbook.html

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multiplication concepts - repeated addition, array, using multiplication to compare, writing multiplication stories, understanding multiples, and problem solving with multiple-steps.

Multiplication Game – I have, who has game to make.

[image:7.792.30.730.33.283.2]

Multiplication Wheel - Multiply the number in the middle with the number on the outside to figure out the answer.

http://www.superteacherworksheets.com/multiplication/multiplication-ihavewhohas_TWZDR.pdf