
BIRTH
X
1 year
X
1 year
X
1 year
X
1 year
X
1 year
X
1 year
X

BIRTH
X
1 year
X
1 year
X
1 year
X
1 year
X
1 year
X
1 year
X

BIRTH
X
1 year
X
1 year
X
1 year
X
1 year
X
1 year
X
1 year
X

BIRTH
X
Just Getting Started – What’s Typical: No exposure to written words. Parents talk and coo with baby.
1st Year
X
First Words Begin– What’s Typical: Children begin saying a few simple words. Reading isn’t introduced.
2nd Year
X
Vocabulary Growth– What’s Typical: Children speak in short phrases. No consistent exposure to written words.
3rd year
X
Language Development– What’s Typical: Focus is still on speaking and listening. Few know any words by sight.
4th year
X
Pre-K Concepts Introduced– What’s Typical: Some letter recognition begins. Reading is still not expected.
5th year
X
Early Reading Skills Begin– What’s Typical: Children start learning letters and sounds—often for the first time.
6th year
X
Reading Instruction Begins in School– What’s Typical: Formal literacy instruction typically starts. Many children are behind.

Year 0 – The Window Opens
X

Year 1 – Rapid Growth Begins
X

Year 2 – 75% of Brain Development Is Complete
X

Year 3 – Peak Learning Zone
X

Year 4 – Independent Reading Begins
X

Year 5 – 90% Brain Development Is Complete
X

Year 6 – Final Stretch: The Window Closes
X
