MoyoEd Research

Dr. Caleb Moyo.

1. Why A-level chemistry cannot be taught like a spelling test.

A-level chemistry (ages 16–18) requires students to reason about entities they cannot see, touch, or smell: orbitals, transition states, equilibria, entropy, and molecular structure. These are not facts to memorise; they are models to be understood. When teaching relies heavily on transmission and rehearsal (“copy this, remember that”), students often succeed at short-term recall but fail at conceptual transfer, which is what exams increasingly require.

Constructivism offers a better fit. It proposes that learners actively build understanding by integrating new information into their existing mental models rather than passively absorbing knowledge (Bodner, 1986). This theory is grounded in the work of Jean Piaget, who described learning as the restructuring of cognitive schemas, and Lev Vygotsky, who showed that learning is fundamentally social in nature.

In chemistry terms, students do not “receive” the idea of equilibrium—they must reconcile it with their everyday intuition that reactions “go to completion.” If they do not, they memorise Le Châtelier’s principle without ever understanding why it works. This is how you get A grades and shaky thinking, which is never a healthy combination.

2. Why Vygotsky matters more than ever in chemistry classrooms.

Vygotsky’s (1978) Zone of Proximal Development (ZPD) describes the space between what a learner can do alone and what they can do with expert support. In A-level chemistry, this is critical: students can often perform algorithms (e.g., calculating pH) long before they understand the chemical meaning of those numbers.

Research shows that peer interaction, guided questioning, and teacher scaffolding within the ZPD produce significantly stronger conceptual learning in science than individual work (Taber, 1997; Talanquer, 2018). For example, when students debate why adding acid shifts equilibrium, they expose faulty reasoning that would otherwise remain invisible  and therefore uncorrected. In short, thinking improves when it is shared.

3. Constructivism works well in A-level chemistry.

3.1 It repairs misconceptions instead of hiding them:

A-level students do not arrive as blank slates. They bring powerful but often incorrect mental models, such as:

• Atoms “want” to fill shells
• Bonds are physical sticks
• Energy is “stored in bonds”

These ideas are extraordinarily resistant to change (Taber, 2014). Traditional instruction often leaves them untouched, whereas constructivist methods force them into the open. When students compare molecular models, interpret spectra, or predict reaction outcomes, incorrect ideas collide with evidence, creating what Piaget called a cognitive conflict.

Multiple-representation learning (symbolic, sub-microscopic, and macroscopic) has been shown to significantly improve students’ ability to reason about chemical systems (Johnstone, 2000; Wink et al., 2014).

3.2 It improves long-term retention and transfer of learning.

Students taught using active, model-based instruction consistently outperform those taught through lectures alone, especially on questions requiring reasoning rather than recall (Freeman et al., 2014; Talanquer, 2018). In A-level terms, this means fewer students who can “do” Hess cycles but cannot explain what enthalpy is.

3.3 It increases engagement and reduces chemistry anxiety.

Chemistry is one of the most anxiety-inducing A-level subjects. Constructivist approaches, such as problem-based learning and simulation-supported inquiry, reduce anxiety and increase persistence (Seery, 2010; Makransky et al., 2019). When students manipulate models and explore systems, chemistry stops being a wall of symbols and starts to behave like a coherent world.

4. The hard truth: Constructivism is not easy to implement.

Constructivist teaching fails when it is misunderstood as “let students discover everything.” This is not Vygotsky; it is pedagogical negligence.

4.1 Misconceptions do not disappear by themselves.

Without explicit scaffolding, students often reinforce incorrect models through peer discussions (Taber, 2014). Group work without guidance can produce confident nonsense, which is very entertaining but not very educational.

4.2 Time pressure and exam specifications.

A-level curricula are dense and unforgiving. Teachers feel pressured to “cover content,” even when students have not understood the foundations. This creates a conflict between curriculum pacing and cognitive readiness (Talanquer, 2018).

4.3 Assessment systems still reward the recall.

High-stakes examinations often lag behind research. When tests reward algorithmic fluency more than conceptual reasoning, schools naturally teach to the test, even when it undermines real learning.

5. How to make constructivism work in A-level chemistry.

5.1 Diagnose before teaching.

Concept inventories and diagnostic quizzes reveal students’ prior models and allow teaching to target the ZPD (Taber, 2014). If you do not know what students think, you cannot change their thinking.

5.2 Structured peer learning.

Assign roles in group work (explainer, skeptic, and modeller). Structured collaboration dramatically improves conceptual gains compared to free discussions (Seery, 2010).

5.3 Use of visual and digital scaffolds.

Simulations, such as PhET, allow students to explore molecular dynamics that cannot be directly observed. These tools significantly improve conceptual understanding when they are paired with guided inquiry (Makransky et al., 2019).

5.4 Align assessment with reasoning.

Use exam-style questions that require explanation, prediction, and justification, not just calculation. Otherwise, students will optimise for memorisation (because they are rational).

6. Conclusion.

Constructivist pedagogy—properly scaffolded, socially supported, and aligned with assessment—offers one of the most powerful ways to improve learning in A-level chemistry education. It transforms students from formula reciters into chemical thinkers. In a world where AI can already perform calculations, this difference has never been more significant.

References.

Bodner, G. M. (1986). Constructivism: A theory of knowledge. Journal of Chemical Education, 63(10), 873–878.
https://pubs.acs.org/doi/10.1021/ed063p873

Freeman, S. et al. (2014). Active learning increases student performance in STEM. PNAS, 111(23), 8410–8415.
https://www.pnas.org/doi/10.1073/pnas.1319030111

Johnstone, A. H. (2000). Teaching of chemistry – logical or psychological? Chemistry Education Research and Practice, 1(1), 9–15.
https://pubs.rsc.org/en/content/articlelanding/2000/rp/a9rp90001b

Makransky, G., et al. (2019). Immersive simulations in science learning. Educational Psychology Review, 31, 1–30.
https://link.springer.com/article/10.1007/s10648-019-09479-2

Seery, M. (2010). Reconsidering constructivism in chemistry education.
https://michaelseery.com/constructivism-in-chemistry

Taber, K. S. (1997). Student understanding of chemical bonding. International Journal of Science Education, 19(5), 557–573.
https://www.tandfonline.com/doi/abs/10.1080/0950069970190504

Taber, K. S. (2014). Misconceptions in chemistry education. Journal of Chemical Education, 91(4), 470–475.
https://pubs.acs.org/doi/10.1021/ed400739b

Talanquer, V. (2018). Evidence-based chemistry teaching. Chemical Reviews, 118(10), 5205–5241.
https://pubs.acs.org/doi/10.1021/acs.chemrev.8b00020

Vygotsky, L. S. (1978). Mind in Society. Harvard University Press.
https://www.hup.harvard.edu/books/9780674576292

Wink, D. J. et al. (2014). Multiple representations in chemistry learning. Chemistry Education Research and Practice, 15, 1–10.
https://pubs.rsc.org/en/content/articlelanding/2014/rp/c3rp00150a