Just-in-time instruction

Time the instruction to arrive immediately after the failure — not days later and not instead of failure.

Why it works

The productive failure benefit is not merely that failure happened — it is that the instruction arrives when the learner has an active, felt gap from the recent failure. The gap creates a "need to know" state that boosts encoding of the instruction. Delayed instruction loses this advantage; premature instruction prevents the failure from occurring. Just-in-time timing captures the window when the gap is fresh and instruction is most meaningful.

How to do it

1. Plan the instruction session to follow the exploration session within 24 hours, not the same afternoon if possible.
2. Begin the instruction session with a brief recap of what the exploration produced — the attempts and their failures.
3. Structure the instruction as answers to the questions the exploration raised, not as a standalone presentation.
4. Confirm at the end that each failed attempt has been accounted for by the instruction.

Evidence

Kapur’s experimental design places instruction immediately after the exploration-and-failure phase. The timing is built into the treatment rather than separately tested, but the "need to know" state is supported by curiosity and motivation research. (mechanistic)

The optimal instruction timing within productive failure designs is not independently optimized; "immediately after" is the design as implemented, not a separately tested variable.

Common mistake

Scheduling exploration as a standalone session and then not returning to structured instruction within the window when the gaps are still active — allowing curiosity to dissipate and the preparation benefit to fade.