Teaching mixed-ability classes

The real problem is pace, not level

In a mixed group, two populations cause trouble at the same time, for opposite reasons:

• Fast learners finish in ten minutes what will take thirty. With nothing to move on to, they chat — and get told off for behaviour the setup caused.
• Struggling learners disengage at the first difficulty and do not say so. Their gap stays invisible until the assessment, when it is too late.

Differentiation that works does not hand everyone different content. It organises the lesson so that everyone moves at their own pace toward the same objective, freeing the teacher to go where they are actually needed.

Setup 1 — A common core, then two routes

The simplest and the most effective. You prepare one activity, in two stages:

• A core everyone must reach — five to eight questions, or one guided exercise.
• A conditional continuation: those who pass the core move to an extension activity; the others work through it again with you.

In practice a guided course does this on its own: it alternates explanation and check question, and the learner only advances once they have understood. You no longer have to track who is where — you see progress and sit down next to whoever is stuck.

Preparation cost: one sequence, plus two or three more questions than usual.

Setup 2 — A standing reserve for fast learners

The blind spot of differentiation is the learner who is ahead. They are often asked to "help their neighbour", which is useful one time in three and tedious the other two.

A permanently available reserve of activities settles it without extra preparation:

• A flashcard deck on the term's key ideas, reachable from a link on the board. They revise alone, without calling on you.
• An interactive video on an extension topic: they watch, answer the embedded questions, and you get their answers.
• An extension quiz reused from one year to the next.

What matters is that this reserve is always in the same place. Once the habit is set, learners go there by themselves and staggered finishing times stop being a problem.

Setup 3 — Make it visible who needs help

Difficulty is invisible. A learner who does not understand stays quiet, especially in front of others. Two simple moves surface the information without exposing anyone:

• A mid-lesson check quiz, ungraded, on the day's idea. The results table tells you in thirty seconds whether you can move on or need to reteach. Without it you are flying blind.
• A tracking board where each learner moves their card: "got it" / "not sure" / "stuck". Moving a card costs less than raising a hand in front of thirty people.

What you do with it matters more than the tool: if nobody ever helps those who flag themselves, the practice dies within two weeks.

What does not work

• Preparing three versions of every lesson. Unsustainable over a year. You will last three weeks, then drop differentiation altogether.
• Fixed ability groups. The label sticks fast, and learners in the bottom group stop trying. Groups that change with the topic produce the opposite effect.
• Giving "more" to fast learners. More of the same exercise reads as punishment. Give something else: an extension, an application, an open question.
• Waiting for the assessment to discover the gaps. By then, catching up costs ten times more than a five-minute check quiz.