Grade 2: Becoming Fluent with Addition and Subtraction
Rating: 
Common Core Standards
Content Standards
MCC.2.OA.1, MCC.2.OA.2
MCC.2.NBT.5
MCC.2.MD.8, MCC.2.MD.10
Standards for Mathematical Practice
MP.1 Make sense of problems and persevere in solving them.
MP.2 Reason abstractly and quantitatively.
MP.3 Construct viable arguments and critique the reasoning of others.
MP.4 Model with mathematics.
MP.5 Use appropriate tools strategically.
MP.6 Attend to precision.
MP.7 Look for and make use of structure.
MP.8 Look for and express regularity in repeated reasoning.
Description of Unit
In this 5-6 week unit “Becoming Fluent with Addition and Subtraction” from the Georgia DOE, students are expected to understand how addition and subtraction affect quantities and are related to each other; reinforce the multiple meanings for addition (combine, join, and count on) and subtraction (take away, remove, count back, and compare); recognize how the digits 0-9 are used in our place value system; and continue to develop their understanding solving problems with money. This unit is lengthy because it is building addition and subtraction fluency, which are one of the four critical areas for instruction in second grade. A significant amount of instructional time should be dedicated to these concepts. This unit includes 21 Math performance tasks. Teachers should choose tasks to best meet the needs of their students.
Cautions
Connecticut teachers should be aware that the unit is considered a high quality resource if used with the following suggestions:
- The unit is very lengthy as written and teachers should carefully select specific tasks to meet the needs of their students.
- Guidance for differentiation and extensions are included (particularly, accommodations for assessment) however teachers will have to develop differentiated instruction at the lesson level.
Rationale for Selection
The unit centers on the major work/ concepts of the grade. It includes discourse, which builds mental math capabilities and reasoning skills and lesson-embedded performance tasks. Extensive lesson resources and activities are included. General strategies for instruction of English language learners and students with disabilities are included.