Phase 6: Fluency

Lessons 106-125 · Phase 6 builds fluency with addition and subtraction facts to 20, introduces mental math strategies, and begins two-digit addition.

Concepts Introduced

Symbol	Lesson	Type	Example
make 10	106	strategy	8 + 5 = 8 + 2 + 3 = 10 + 3 = 13
doubles +1	110	strategy	6 + 7 = 6 + 6 + 1 = 13
two-digit + one-digit	115	operation	24 + 5 = 29
two-digit + tens	120	operation	35 + 20 = 55

Skills

Rapid recall of addition/subtraction facts to 20
Make-10 strategy
Doubles-plus-one strategy
Adding a one-digit number to a two-digit number
Adding multiples of 10 to two-digit numbers

Tips for Teachers

Fluency means speed AND accuracy. Use timed practice sparingly — the goal is automaticity, not anxiety. The 'make 10' strategy is powerful and will serve the child for years.

What to Expect

By the end of Phase 6, the learner has rapid recall of facts to 20 and can do simple two-digit addition.

Phase 6: Fluency

Concepts Introduced

Skills

Tips for Teachers

What to Expect

Lessons in This Phase