Why challenge in science lessons?

Jean Piaget, my heroIs there any evidence that challenge leads to better learning in science? Well, I suppose it depends on what we mean by challenge. Challenge does not simply mean difficult. Challenge refers to a moderate level of difficulty that allows students to experience a sense of mastery and competence when they succeed.

Challenging students motivates them. It makes assessment of learning visible, allowing rapid feedback. And, if used effectively, it can help students reorganise their thinking.


Jean Piaget proposed that intellectual growth was the result of cognitive conflict, a specific form of challenge. When a learner meets new information or a new experience that does not align with their current way of thinking, they must form new mental structures that allow this new information to be accommodated. In this way, challenge can bring about cognitive change, involving the reorganisation of children’s ideas.


We can help students progress by actively challenging their misconceptions. Students enter classrooms with a multitude of misconceptions, such as plants don’t respire, cannon balls fall faster than paper clips and light travels from our eyes to the object (Driver et al., 2013). Science teachers must challenge these misconceptions to ensure students arrive at the ‘right’ way of thinking that allows them to make sense of the world around them.


It is also important that the level of challenge is appropriate. Vygotsky (1978) established the concept of the Zone of Proximal Development (ZPD). This can be thought of as an area of challenge where students are unable to succeed alone, and instead need the help of more capable peers or teachers. “What is the Zone of Proximal Development today will be the actual developmental level tomorrow” (Vgotsky p.87).

This differs to ideas proposed by Piaget, who believed children construct understanding for themselves. Indeed, Vygotsky believed intelligence should not be measured when students solve problems independently. Instead, he thought what a child achieved with adult or peer support was more indicative of their mental development.

Science teachers must challenge students at the upper end of their ZPD to help them progress. But it is a fine balance. If students are challenged too much, they are likely to become disinterested and fail.

  1. Cognitive development 
  2. Motivation in science 
  3. Misconceptions in science education
  4. Deep learning in science teaching


Further reading
  • Driver, R., Rushworth, P., Squires, A. and Wood- Robinson, V. (2013) Making sense of secondary science: Research into children’s ideas. Routledge.
  • Piaget, J. and Cook, M.T. (1952). The origins of intelligence in children, WW Norton & Co.
  • Vygotsky, L. S. (1978). Mind in society: The development of higher psychological processes. Cambridge, MA: Harvard University Press.