Public learning track
Addition Strategies and Facts Within 10 and 20
Kindergarten · Math · Open Global Math
7 lessons
Goal
Develop strategic reasoning and recall addition facts within 10 and 20 using counting on, doubles, near doubles, and making ten.
Featured Diagrams
Counting On with Fingers and Number Tracks
7 lessons
0 of 7 done
- 1Counting On with Fingers and Number TracksUp nextStart
- 2Doubles Facts to Doubles of 10PremiumNot started yet
- 3Near Doubles: Doubles Plus 1 and Minus 1Not started yet
- 4Making Ten to Add Within 20Not started yet
- 5Compensation Strategies for AdditionNot started yet
- 6Adding Three Single-Digit NumbersNot started yet
- 7Deriving New Facts from Known Number FactsNot started yet
Standards Covered
- OGM.1.OA.2Open Global Math Standards 2026™ · Math · Level 1 / Kindergarten (Age 5) · KindergartenSolve addition and subtraction contextual word problems within 10 (and examine problems within 20 and 100) using objects, drawings, and counting strategies such as counting on and counting back.
- OGM.1.OA.5Open Global Math Standards 2026™ · Math · Level 1 / Kindergarten (Age 5) · KindergartenFluently add and subtract within 5; recall basic addition facts and related subtraction facts with addends to 10, using strategies including doubles, compensation, and making multiples of ten.
- OGM.1.OA.4Open Global Math Standards 2026™ · Math · Level 1 / Kindergarten (Age 5) · KindergartenFor any number from 1 to 9, find the complement that makes 10 when added to the given number using ten-frames, counters, and mental strategies, recording the relation with drawings and equations.
- OGM.1.OA.6Open Global Math Standards 2026™ · Math · Level 1 / Kindergarten (Age 5) · KindergartenExpress mathematical relationships and operations symbolically using +, -, and =; understand the zero property (n ± 0 = n), commutativity of addition (a + b = b + a), associativity, inverse relationships between addition and subtraction, and determine missing quantities represented by shapes or symbols (e.g., a + [ ] = c).
Curriculum Framework
Kindergarten · Math · Open Global Math
1
7 lessons
Understanding Addition: Joining and Combining
Represent and understand addition as joining groups, combining sets, and increasing quantities using concrete materials, fingers, sounds, and balance models.
2
7 lessons
Understanding Subtraction: Separating and Comparing
Understand and model subtraction as taking away, separating subsets, and finding the difference between two quantities.
3
7 lessons
Part-Part-Whole and Number Decompositions to 10
Decompose numbers up to 10 into pairs in multiple ways using objects, visual diagrams, and equations.
4
8 lessons
Making Ten: Complements and Ten-Frames
Find the missing complement to make 10 for any number 1 to 9 using ten-frames, counters, and mental strategies.
5
6 lessons
Addition and Subtraction Fluency Within 5
Fluently add and subtract within 5 with automaticity and flexibility.
6
7 lessons
Addition Strategies and Facts Within 10 and 20
Develop strategic reasoning and recall addition facts within 10 and 20 using counting on, doubles, near doubles, and making ten.
7
7 lessons
Subtraction Strategies and Facts Within 10 and 20
Develop flexible subtraction strategies including counting back, think-addition, and subtracting through ten within 20.
8
8 lessons
Properties, Equations, and Algebraic Thinking
Understand symbols (+, -, =), arithmetic properties (zero, commutativity, associativity), and find missing numbers in equations.
9
9 lessons
Word Problems and Contextual Problem Solving
Solve a variety of contextual addition and subtraction word problems within 10, 20, and introductory contexts to 100 using multiple models.
10
9 lessons
Repeating and Growing Patterns
Identify, describe, copy, extend, and create repeating and growing patterns using colors, shapes, sounds, movements, and numbers.