An AI tutor for A-Level Maths that understands your working

To get help from a general chatbot you first have to describe your problem to it: retype the question, explain the method you were told to use, and somehow convey four lines of algebra that contain a fraction and an integral sign. By the time you have done that, you have spent longer on transcription than on maths.

Then it hands you a complete, confident solution. That is genuinely useful for checking an answer and close to useless for learning a method, because reading a correct solution feels identical to being able to produce one right up until the moment you sit an exam.

Your working is already on the page, so there is nothing to describe. Plumi reads it, finds the step that broke, and writes a question in the margin next to it.

In the capture below the student has integrated e to the 2x and lost the factor of one half. Plumi does not write the correct answer. It asks what the derivative of e to the 2x is, waits for the student to write 2e to the 2x, and lets them work out what would undo it.

A-Level Maths does not mark answers, it marks method. You can arrive at the wrong number and keep most of the marks, or write the right number with nothing to justify it and lose them.

Because Plumi works from your written method rather than your final answer, that is the thing it can see and comment on. A tool that only ever sees the number at the bottom of the page structurally cannot tell you why you dropped two marks.

• Reads fractions, indices, integrals and substitutions as structure, not as a picture.
• Nudges with a question before it offers a solution.
• Records what your working demonstrated, so the next practice set is not random.

Every marked piece of work updates a model of your specification. The topic you keep getting wrong stops being a vague worry and becomes a named branch with evidence behind it.

Plumi then generates practice against that specific weakness — the same idea, one twist — rather than another mixed paper where you spend most of the time on things you can already do.