Video · Teachers Media
Problem-based learning
Problem-based learning (PBL) starts a unit with a genuine problem rather than a body of content. Pupils meet the problem cold, work out what they need to know to solve it, learn that content in service of the problem, and produce something in response. Done well it builds transferable reasoning; done badly it becomes group work with no depth.
About this video
PBL has a long track record in medical education, where it originated at McMaster University in the 1960s, and increasingly in engineering, design and vocational education. Its take-up in mainstream UK schools has been slower and more contested. Fans point to strong evidence for transfer and motivation; sceptics point to weaker evidence for basic-skill acquisition compared to more explicit instruction, particularly for novices.
The most careful reading of the research (Kirschner and colleagues have been particularly rigorous critics of pure discovery learning) is that PBL works best after pupils have acquired the foundational knowledge, not instead of it. A novice given a genuine problem with no prior knowledge tends to flounder, guess, or copy. A pupil with solid foundations given a well-designed problem can engage in the kind of reasoning that transfers to future problems they haven't seen.
For classroom teachers, the practical implication is: PBL is a good vehicle for consolidating, connecting, and applying knowledge — not for introducing it. The best PBL projects tend to sit at the end of a unit, or across the boundary between units, asking pupils to synthesise what they've learned in a new context.
What separates strong PBL from group work
- A real problem, not a topic dressed as a problem. "Design a school garden that can survive a drought" beats "learn about gardens".
- Prior knowledge in place. Pupils have the foundations to reason with, so the problem stretches them rather than overwhelming them.
- Individual accountability. Every pupil has to produce something, not just contribute to a group product.
- Structured milestones. Not just "here's three weeks, off you go" — clear checkpoints for planning, drafting, presenting.
- A genuine audience or outcome. Pupils know their work will be seen, judged, or used by someone beyond the teacher.
Discussion prompts
- Where in your curriculum does PBL fit — as a way of consolidating knowledge, or as an alternative to teaching it?
- How do you avoid the classic PBL failure mode: pupils spending five hours making a slideshow and learning nothing new?
- What structural conditions (time, group size, milestones, individual accountability) does PBL need in your setting to work?
Try this in your classroom
- Design one PBL sequence for the end of a unit you already teach. Aim for a problem that requires pupils to synthesise the knowledge they've just learned.
- Build in one individual reflective piece at the end of the PBL sequence so you can see what each pupil learned, not just what the group produced.
- After running the PBL, ask pupils to write one sentence about what they now understand better than before. Their answers tell you whether the depth was real.