enVision Mathematics Topic 1
2nd Grade; August – September (3 weeks); 1st Trimester
Embedded Files
Topic Title(s):
Fluently Add and Subtract Within 20
Prepared Graduates:
MP5. Use appropriate tools strategically.
MP6. Attend to precision.
Standard(s):
2. Algebra and Functions
The highlighted evidence outcomes are the priority for all students, serving as the essential concepts and skills. It is recommended that the remaining evidence outcomes listed be addressed as time allows, representing the full breadth of the curriculum.
Students Can (Evidence Outcomes):
2.OA.B. Operations & Algebraic Thinking: Add and subtract within 20.
Fluently add and subtract within 20 using mental strategies. (See 1.OA.C.6 for a list of strategies.) By the end of Grade 2, know from memory all sums of two one-digit numbers. (CCSS: 2.OA.B.2)
Recognize those problems that can be solved mentally versus those that require the use of objects, diagrams, or equations. (MP5)
Add and subtract within 20 quickly, accurately, and flexibly. (MP6)
Inquiry Questions
How can you use addition and subtraction facts you know to quickly determine facts that you don’t know?
Why do you think it is important to know your addition and subtraction facts?
Coherence Connections
This expectation represents major work of the grade.
In Grade 1, students use objects and drawings to add and subtract within 20 in preparation for fluency with mental strategies in Grade 2.
In Grade 2, this expectation connects with using place value understanding and properties of operations to add and subtract within 1000 and fluently add and subtract within 100.
Academic Vocabulary & Language Expectations:
Equation, addend, sum, doubles, near doubles, difference
Assessments:
Instructional Resources & Notes:
enVision Mathematics Topic 1
Additional enVision Mathematics Resources
Let's Investigate! Piñata Surprises (TE) (supports Lessons 1-1, 1-2, 1-3, 1-4)
Additional Math Games: Addition & Subtraction Within 20 (additional materials and preparation may be required)
Tier 1 Intervention & Supports (i-Ready Tools for Instruction):
Tier 1 Intervention: Addition Strategies, Add and Subtract on the Number Line, Addition/Subtraction Fact Families, Solve Comparison Subtraction Problems, Solve One-Step Addition and Subtraction Word Problems, Find the Unknown Number
Coherence Map/Concept Progressions: 2.OA.B.2
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