Why "Drill and Kill" Maths Apps Get It Wrong

Most online maths platforms work the same way: ask a question, mark it right or wrong, move on to the next one. Get something wrong, and you get a red cross, the correct answer, and no real idea why you got there in the first place.

That's fine if the issue really was a slip — a careless arithmetic error, a rushed read of the question. But if your child has genuinely misunderstood the concept, doing another twenty questions in the same style won't fix it. It just gives them twenty more chances to get it wrong the same way, and twenty more reasons to feel like they're "bad at maths."

A wrong answer is information, not just a mistake

Take a child who calculates 1/3 + 1/4 as 2/7. The mark is wrong either way — but the mistake itself is useful. It tells you they're adding numerators and denominators separately, like two ordinary numbers, rather than finding a common denominator first.

A drill-and-mark app can only tell you the score was wrong. What actually helps is using that answer to work out what to teach next.

What that looks like in practice

Here's roughly how the Grasp Maths engine differs from a straightforward practice-and-mark app once a child gets something wrong:

• Instead of a static right/wrong mark, it tries to identify the specific misconception behind the error.
• Instead of a generic textbook worked example, it can walk through the method using the child's own numbers — so the explanation actually matches the problem they were stuck on.
• Instead of another question at the same difficulty, it can step the difficulty down temporarily to rebuild the missing piece, then step it back up once that's solid.
• Instead of simply moving on, it uses what it's learned to help decide what to practise next.

None of this replaces practice — children still need repetition to build real fluency. It just means the practice is aimed at the actual gap, not just at "more questions about fractions."

Why this matters more than it sounds

Confidence in maths rarely comes from getting easy questions right over and over. It comes from understanding why a mistake happened and knowing you can fix it. A child who's told "you got 6 out of 10, try again" learns very little about what to do differently. A child who's shown exactly where their thinking went wrong — with a worked example that actually matches their own problem — has something to act on.

Stop drilling. Start diagnosing.