DEVELOPMENTAL MILESTONES · YEAR ONE

2, 4, 6, 9, 12 months per the CDC checklists (2022 revision): 59 milestones that at least 75% of children reach by each age

Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.

Three sizes in one archive — from a sheet on the fridge to a poster on the wall.

Formats: A4 · A3 · A2
What you get: Print-ready PDFs, one per size, with every letterform converted to outlines — nothing to install, nothing to shift.
Subject: body and care · everyone · reference · nursery

The items are verbatim from the CDC “Learn the Signs. Act Early.” checklists, 2022 revision (Zubler et al., Pediatrics). The coloured dot marks the developmental domain — see the legend at the top. This is a surveillance tool, not a diagnosis: if a milestone is missing, talk to the pediatrician rather than wait. The AAP recommends general developmental screening at 9, 18 and 24 months. Checked 2026-08-13.

CRAWLING IS NOT ON THIS SHEET — AND THAT IS NOT A MISTAKE

In 2022 the CDC and the American Academy of Pediatrics rewrote the checklists for the first time since 2004 — and dropped crawling entirely: too many healthy children skip it or invent their own version for it to work as a milestone.

The measure itself changed too: a milestone is now what at least 75% of children can do by that age, not what the average child does. The old 50% bar told parents to wait; the new one means a missed milestone is discussed with the pediatrician right away.

On the sheet

The items are verbatim from the CDC “Learn the Signs. Act Early.” checklists, 2022 revision (Zubler et al., Pediatrics). The coloured dot marks the developmental domain — see the legend at the top. This is a surveillance tool, not a diagnosis: if a milestone is missing, talk to the pediatrician rather than wait. The AAP recommends general developmental screening at 9, 18 and 24 months. Checked 2026-08-13.
Colour carries meaning, but meaning never rests on colour alone — the sheet reads in black and white.
Nothing about how it was made: the sheet carries only what the reader needs.

Printing

Three sizes in the archive: A4 — 210×297 mm, A3 — 297×420 mm, A2 — 420×594 mm.
All text is converted to outlines. No fonts to install, and nothing shifts on another machine.
White background and sparing fills — it prints on a home printer without draining the cartridge.
Margins of at least 10 mm: a home printer cannot print to the edge.
No stroke thinner than 0.3 mm, so nothing disappears in print.

Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 9 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.

DEVELOPMENTAL MILESTONES · YEAR ONE

CRAWLING IS NOT ON THIS SHEET — AND THAT IS NOT A MISTAKE

On the sheet

Printing

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