Why Symmetry Fold Detective works

Symmetry Fold Detective gives the child a concrete way to practice reasoning that can be explained from visible clues or rules once they begin by learning to draw or choose one simple shape with a few possible fold lines. Study simple shapes and decide which imagined fold line would make the two sides match most closely. The next test is whether that experience helps when they are asked to study the left and right or top and bottom features around one line.

Set up — Draw or choose one simple shape with a few possible fold lines

Prepare paper and pencil before the child is asked to draw or choose one simple shape with a few possible fold lines. Arrange the space so the instruction to draw or choose one simple shape with a few possible fold lines can happen cleanly before the child is asked to study the left and right or top and bottom features around one line. Use age-appropriate pieces and avoid small loose parts for children who may mouth objects during that setup.

Step 2 — Study the left and right or top and bottom features around one…

Keep the adult prompt brief while the child tries to study the left and right or top and bottom features around one line. If needed, return to the earlier step to draw or choose one simple shape with a few possible fold lines before asking them to predict whether folding on that line would make the sides match.

Step 3 — Predict whether folding on that line would make the sides match

Keep the pace slow while the child tries to predict whether folding on that line would make the sides match. If the effect is hard to see, simplify that action before continuing with the instruction to check by tracing corresponding corners, curves or marks on both sides.

Step 4 — Check by tracing corresponding corners, curves or marks on both sides

Treat the attempt to check by tracing corresponding corners, curves or marks on both sides as a checkpoint between the earlier step to predict whether folding on that line would make the sides match and the coming step to choose the best fold line and explain which features support the decision. A perfect answer is not required.

Step 5 — Choose the best fold line and explain which features support the decision

After completing the instruction to choose the best fold line and explain which features support the decision, pause and ask what changed from the earlier step where they had to check by tracing corresponding corners, curves or marks on both sides. Use that answer to decide whether they are ready to choose the best fold line and explain which features support the decision.

What to notice before Choose the best fold line and explain which…

Watch what happens after the child is asked to predict whether folding on that line would make the sides match. A pause, correction, or question can be useful evidence of which clue, position, or relationship supports the answer before they continue to check by tracing corresponding corners, curves or marks on both sides.

Make Predict whether folding on that line would… easier or harder

Keep difficulty tied to the decision around check by tracing corresponding corners, curves or marks on both sides. First, use fewer items and make the relevant difference more obvious; later, add one plausible distractor, remove one cue, or ask the child to explain the rule, while preserving the reason the child eventually has to choose the best fold line and explain which features support the decision.

Finish after Choose the best fold line and explain which…

Choose the best fold line and explain which features support the decision. That is the natural place to end this version of Symmetry Fold Detective. For another activity, use the activity search or create one with the activity generator.