8–20 monthsNumerical PatternsShape, Space and Measure (no distinct 2021 ELG)
Attempts, sometimes successfully, to fit shapes into spaces on inset boards or jigsaw puzzles.
Observe whether the child: attempts, sometimes successfully, to fit shapes into spaces on inset boards or jigsaw puzzles.
What it looks like
Three ways this behaviour shows up as a child grows. Each level includes everyday moments to watch for.
Emerging
Just starting
The child shows intent to fit a piece into a space (aims toward a hole/outline) but often misaligns or pushes without rotating/adjusting. They benefit from adult guidance (pointing, slowing down, hand-over-hand).
What you might see
The child puts pieces on top of the board but does not aim for the matching space.
After one failed push, the child drops the piece and moves to another toy without trying again.
The child repeatedly tries to force a piece into the wrong hole without noticing the mismatch.
The child moves a piece toward the correct space but pushes it in without adjusting when it doesn’t fit.
The child tries the same piece in several holes quickly, showing exploration but not matching strategy.
With an adult pointing to the correct space, the child attempts to place the piece there but still misaligns.
Expected
On track
The child fits some simple shapes/pieces in familiar boards (large knobbed insets, very simple jigsaws) with effort and persistence, occasionally adjusting orientation after a failed try. Adult support is mostly verbal/gestural rather than doing it for them.
What you might see
The child fits one or two large inset shapes (e.g., circle/square) after a couple of attempts and small adjustments.
The child turns a piece once after it doesn’t fit and tries again in the same space.
The child persists for 20–30 seconds on a piece, trying again after failure rather than abandoning immediately.
Exceeding
Going further
The child fits multiple pieces/shapes on an inset board or simple jigsaw by matching outlines and adjusting angle/rotation, completing a small set with minimal help. They persist after errors and use trial-and-adjust rather than random placement.
What you might see
The child completes most of a simple inset board (several shapes) by matching pieces to their spaces with minimal prompting.
When a piece doesn’t fit, the child rotates or flips it and tries again until it slides into place.
The child notices and corrects a wrong placement (removes a mismatched piece and searches for the right one).
The child starts by finding edge/corner pieces in a simple jigsaw and places them appropriately without being shown.
The child helps a peer by handing the right piece for a space or by demonstrating turning the piece.
In a new puzzle, the child uses the same fitting approach (match outline → adjust angle → try again) without adult coaching.
Try this at home
Small everyday moments where you can notice this behaviour without setting up anything special.
During floor play, offer a knobbed inset puzzle and watch: does your child aim for the matching space and try to adjust the piece when it doesn’t fit?
At a calm transition time (before lunch/nap), do a 2-minute “one piece challenge”: give one piece and point to the space—notice persistence and whether they rotate/try again.
In the bath, use foam shapes on the wall and a matching outline drawn with your finger: ask “Where does this one go?” Observe matching attempts and adjustments.
While waiting (e.g., café/doctor), offer a very simple 2–4 piece puzzle and see whether your child tries to match pictures/shapes rather than random placement.
During tidy-up, turn it into a game: “Can you put the triangle in?” Notice whether your child searches for the correct space and attempts a fit.
Connected behaviours
Behaviours that scaffold, follow, or co-emerge with this one.
The framework source and supporting developmental research.
Framework source
Development Matters in the EYFS (2012) (DM2012) — Mathematics: Shape, space and measure (age band statements).
The framework defines early shape-fitting as a practical, observable behaviour emerging through hands-on exploration with inset boards and puzzles.
Developmental research
Piaget, J. (1952). The Origins of Intelligence in Children.
Sensorimotor problem solving through repeated action and adjustment provides a developmental rationale for using trial-and-fit behaviours as mastery indicators.
Five-level rubric (detailed)ShowHide
The full progression underlying the three levels above. Used by the platform’s reasoning agent when planning activities and observations.
Not Yet
The child explores puzzle pieces mainly by mouthing, banging, or moving them without trying to match piece to space. They may place pieces randomly and quickly abandon the task.
The child puts pieces on top of the board but does not aim for the matching space.
After one failed push, the child drops the piece and moves to another toy without trying again.
The child repeatedly tries to force a piece into the wrong hole without noticing the mismatch.
Emerging
The child shows intent to fit a piece into a space (aims toward a hole/outline) but often misaligns or pushes without rotating/adjusting. They benefit from adult guidance (pointing, slowing down, hand-over-hand).
The child moves a piece toward the correct space but pushes it in without adjusting when it doesn’t fit.
The child tries the same piece in several holes quickly, showing exploration but not matching strategy.
With an adult pointing to the correct space, the child attempts to place the piece there but still misaligns.
Developing
The child fits some simple shapes/pieces in familiar boards (large knobbed insets, very simple jigsaws) with effort and persistence, occasionally adjusting orientation after a failed try. Adult support is mostly verbal/gestural rather than doing it for them.
The child fits one or two large inset shapes (e.g., circle/square) after a couple of attempts and small adjustments.
The child turns a piece once after it doesn’t fit and tries again in the same space.
The child persists for 20–30 seconds on a piece, trying again after failure rather than abandoning immediately.
Secure
The child fits multiple pieces/shapes on an inset board or simple jigsaw by matching outlines and adjusting angle/rotation, completing a small set with minimal help. They persist after errors and use trial-and-adjust rather than random placement.
The child completes most of a simple inset board (several shapes) by matching pieces to their spaces with minimal prompting.
When a piece doesn’t fit, the child rotates or flips it and tries again until it slides into place.
The child notices and corrects a wrong placement (removes a mismatched piece and searches for the right one).
Reflexive
The child transfers fitting strategies to new puzzles, selects the correct piece among several, and can demonstrate or prompt another child to turn/try again. They use cues like edges/corners/outline match in an age-appropriate way.
The child starts by finding edge/corner pieces in a simple jigsaw and places them appropriately without being shown.
The child helps a peer by handing the right piece for a space or by demonstrating turning the piece.
In a new puzzle, the child uses the same fitting approach (match outline → adjust angle → try again) without adult coaching.
