Grade 2 - Tier 2
Addition and Subtraction
(small group instruction on this topic should occur at least 6 weeks after Tier 1 instruction)
Embedded Files
Curriculum Expectations
Curriculum Expectations
B2.1 use the properties of addition and subtraction, and the relationships between addition and multiplication and between subtraction and division, to solve problems and check calculations
B2.2 recall and demonstrate addition facts for numbers up to 20, and related subtraction facts
B2.3 use mental math strategies, including estimation, to add and subtract whole numbers that add up to no more than 50, and explain the strategies used
B2.4 use objects, diagrams, and equations to represent, describe, and solve situations involving addition and subtraction of whole numbers that add up to no more than 100
Watch this video to learn how to adminster & assess Entry Check-In.
Watch this video to learn how to adminster & assess Entry Check-In.
Watch this video to learn how to effectively use the Tracking Sheet & access the Problem Sets.
Watch this video to learn how to effectively use the Tracking Sheet & access the Problem Sets.
Things to Note
Things to Note
Fluency with addition and subtraction follows a developmental progression
(see Slides 2-5 of each problem set to review this progression).For more information about Foundational Facts and Derived Facts, please read the National Council of Teaching of Mathematics (NCTM) article called
"The Five Fundamentals".For more information about Strategies, please refer to the Ontario Ministry of Education's "Strategies for Mental Math" document and various resources that can be found in your school (e.g., What to Look For by Lawson, Minilessons by Fosnot, and Teaching Developmentally by Van De Walle).
Important Tools & Representations
Important Tools & Representations
Tools/Manipulatives: counters, rekenreks, base ten materials, relational rods, etc.
Representations/Models: ten frames, number path or number line, etc.
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