Phase 3: Addition

Lessons 41-65 · Phase 3 teaches addition facts to 10 systematically, starting with +1, +2, then building to all single-digit addition.

Concepts Introduced

Symbol	Lesson	Type	Example
+1	41	operation	3 + 1 = 4
+2	45	operation	5 + 2 = 7
+3	49	operation	4 + 3 = 7
doubles	53	strategy	3 + 3 = 6
+0	56	operation	5 + 0 = 5
commutative	58	property	2 + 3 = 3 + 2
number bonds	60	concept	5 = 2 + 3

Skills

Adding 1, 2, and 3 to any single digit
Doubles facts (1+1 through 5+5)
Adding zero
Understanding the commutative property
Number bonds to 10
Solving addition equations with missing addends

Tips for Teachers

Addition is taught in a specific order for a reason. +1 facts are easiest because they connect to counting. Doubles are memorable. Build from what the child already knows. Do not rush to subtraction.

What to Expect

By the end of Phase 3, the learner knows all addition facts to 10 and understands number bonds.

Phase 3: Addition

Concepts Introduced

Skills

Tips for Teachers

What to Expect

Lessons in This Phase