Common remedial mistakes teachers make (and what to do instead)

Remedial is one of the most generous things teachers do — staying back, giving up free periods, trying to catch students up. Which makes it genuinely frustrating when it does not work. And when remedial does not work, the reason is almost never effort. It is one of a small number of recurring traps, each of which is easy to fall into and easy to fix once you can name it.

Here are the five that waste the most remedial time in Science, and what to do instead. If you want the positive version first — how to plan a session that avoids all of these — see how to plan effective remedial lessons, or the overview in the remedial teaching hub.

Mistake 1 — Reteaching everything

The instinct, when a topic produced a lot of wrong answers, is to teach the whole topic again. But the students already sat through it, and re-delivering the same content — especially with the same examples — tends to leave the misconception exactly where it was. Worse, it eats the time you needed for the one idea that actually mattered.

Instead: pick the one or two misconceptions that showed up most, and build the session around those alone. A sharp twenty minutes on one idea beats an hour spread thin. The research on effective instruction is clear that focused, well-structured reteaching outperforms simply going over everything again (Rosenshine, 2012).

Mistake 2 — Grouping by the wrong thing

Remedial groups often get built by the class register, by overall mark, or by "the weak ones." None of those match the actual gap. A student with a strong overall mark can still hold one stubborn misconception; a student with a low mark might just have run out of time.

Instead: group by the gap. Sort the class by the specific question and put the students who share the same wrong answer together. The evidence on small-group support is most encouraging when the group is tightly matched to one need (EEF Toolkit), and that only happens when grouping follows the misconception, not the mark.

Mistake 3 — Fixing the symptom, not the misconception

It is tempting to correct the visible error — the wrong unit, the missing keyword, the mislabelled diagram — and move on. But the visible error is usually a symptom of an idea the student is holding wrongly. Fix only the symptom and the same misconception resurfaces in the next question that needs it.

Instead: ask why the wrong answer happened. "They confused mass and weight" is a cause you can teach against; "they got question 7 wrong" is not. These durable underlying ideas are well documented (Driver et al., 1994), and the ones that recur most in primary Science are in the misconceptions hub. Target the cause and the symptoms tend to clear up on their own.

Mistake 4 — Repeating instead of contrasting

This is the subtle one. Even teachers who target a single misconception often address it by explaining the correct idea more clearly — which helps, but frequently does not dislodge a wrong idea the student is confident in. A confident misconception competes with the new explanation, and often wins on the day of the test.

Instead: make the wrong idea visible and put it directly beside the correct one. Ask students to predict first, so the gap between what they expect and what happens does the work. Then apply the correct model to a fresh example. Confronting the misconception, rather than talking past it, is what tends to shift it.

Mistake 5 — No re-check

The most common omission of all. The session goes well, the students seem to get it, and that is where it ends. But a misconception displaced inside a lesson can return under different wording within a week, and without a re-check you will not find out until the next exam — too late to do anything about it.

Instead: plan a short re-check a few days later, a couple of questions on the same idea in a new context. It costs five minutes and it is the only honest way to know whether the remedial actually closed the gap.

Pulling it together

None of these traps look like mistakes in the moment — they all feel like reasonable teaching. That is exactly why they persist. The common thread in the fixes is the same: target one real gap, for the students who actually have it, by confronting the idea directly, and check that it closed. That is the whole of the marking-to-remedial workflow in one line.

An honest boundary

Avoiding these traps stacks the odds in your favour; it does not guarantee that every misconception clears in one session. Some are stubborn, and your knowledge of an individual student still outranks any checklist. Use this as a way to stop wasting remedial time, not as a promise of results.

If finding the real gap across a class is the slow part, MyScienceHOD is built to surface where understanding is fragile from the marking you already do, leaving the remedial response to you. The free Beta is open to Singapore Science teachers and departments.