Cognitive Constraints - Final
Rethinking Teaching as Management of Cognitive Constraints
In Part 1, Part 2, and Part 3, I shared about nine different cognitive constraints and that learning is bottlenecked by at least one of these constraints at a time.
From the perspective of these cognitive constraints, I wanted to re-think (or even redefine) effective teaching.
But first, let’s remind ourselves about the nature of learning.
Three Non-negotiable Facts about Learning
From a cognitive psychology and instructional design lens, rethinking of teaching rests on the following three non-negotiable facts.
1. Learning is limited by cognitive constrains
Students are not limited by “effort” or “motivation” in the abstract. They’re limited by specific cognitive constraints, such as:
Working memory overload
Missing prerequisite schemas
Low retrieval strength
At any moment, one of these constraint impedes learning. So, if a teacher continues teaching without changing or resolving the constraint, meaningful learning does not happen.
2. Observable behavior is a terrible proxy for constraint change
This is where most teaching goes wrong. Teachers are used to advancing instruction based on surface indicators like:
Students look engaged
Everyone completed the task
Group discussion sounded lively
The bell rang
But none of these precisely tell us whether the teacher was able to resolve cognitive constraints.
In reality, students can look engaged while developing misunderstanding. They might finish an activity by copying or using AI. They might participate fluently without changing a wrong mental model. And, also look busy while encoding nothing durable in their memory.
3. Instruction is an intervention, not a performance
From an instructional design standpoint, teaching is closer to engineering than to performance art.
Every instructional move must answer one question:
Which constraint am I trying to overcome right now?
And the follow-up:
Did that constraint actually shift?
If it didn’t, adding explanations will not help the students. Nor will adding discussion or activities. Moving on to another concept or more complex idea will only compound failure to learn.
Rethinking about Teaching
With these three non-negotiable facts about learning, along with the cognitive constraints, we can re-think teaching as:
The process of:
- planning for and managing the cognitive constraints,
- designing the environmental conditions for learning, and
- delivering instruction precisely
to create durable changes in a student’s understanding.
To be more explicit, teaching is the intentional process of reducing, sequencing, and shifting the cognitive constraints so that learners can effectively construct, retrieve, and automate accurate mental models.
By moving beyond the surface-level aesthetics of a “lively and engaging” classroom, we can define teaching as the structural engineering of learning: an approach that prioritizes the internal shift of cognitive limits over the mere external activity of the student.
This re-thinking of teaching might look “cold” and “uncomfortable” for a lot of teachers because this removes moral language (good teaching, bad teaching, trying hard, being engaged), removes performative teaching, and removes emotional language (students felt happy during activities).
This re-thinking forces us to diagnose the constraints over focusing on the delivery.
Like this:
Detect constraints → Target intervention → Verify shift → Advance
But, not this:
Plan → Activity → Hope → Move on
Disclaimer:
The idea of Cognitive Constraints was inspired from the book How We Learn: Why Brains Learn Better Than Any Machine . . . for Now by Stanislas Dehaene.