Mathski — IB Mathematics IA and Revision Tool

WHAT IS MATHSKI

your IB maths companion.

mathski gives you three things: practice worksheets for every topic, past-style exam questions, and an AI-powered IA marking tool that grades criterion-by-criterion with calibrated feedback — the same way your teacher does.

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Worksheets

parallel practice sheets for every topic. questions and solutions toggle between orange steps and blue final answers.

✏️

Exam Questions

past-style questions organised by topic. coming soon.

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IA Marking

upload your IA and get criterion-by-criterion marks with coversheet comments, ready for your teacher to review.

FOR TEACHERS

mathski's IA marking tool is available for individual students at £3.49 per report — including criterion marks, secure/borderline/vulnerable verdicts, and a personalised improvement breakdown sent to your inbox. Teacher accounts get unlimited access for £49.99/year.

TEACHERS

£49.99 per year

unlimited IA marks for your whole class
criterion-by-criterion marks with calibrated feedback
coversheet comments, ready to edit
strict, moderation-ready marking
anchor paper context included

get teacher access →

mock papers coming soon — included in teacher plan.

BEFORE YOU BEGIN

How Mathski works — and what it can't do

First-pass drafting aid only. All marks must be reviewed and finalised by the teacher.

Criteria C and D need the most human oversight — most prone to over-award.

Mathematical correctness in Criterion E is checked but not guaranteed. Verify calculations independently.

Graphs, GDC screenshots, and diagrams in PDFs may not be fully readable. Note this for Criterion B.

Marks anchored strictly to official IB descriptor language. Volume and ambition do not substitute for meeting descriptors.

Each criterion flagged secure / borderline / vulnerable to support moderation-ready submission.

Built on official IB Mathematics IA assessment criteria and descriptors for SL and HL.

Coversheet comments are drafts — edit before pasting into any official form or IBIS.

THE MARKING FRAMEWORK

What is your IA marked against?

Every IB Mathematics Internal Assessment is marked by your teacher against five criteria — A through E — and then externally moderated by the IB. The total mark is out of 20. Criteria A to D are identical for SL and HL students. Criterion E (Use of Mathematics) has separate descriptors for SL and HL, with HL requiring greater sophistication and rigour at the top bands.

A Presentation B Mathematical Communication C Personal Engagement D Reflection E Use of Mathematics

Marking uses a best-fit model — the descriptor that most accurately reflects the overall level of the work is selected. It is not necessary for every aspect of a descriptor to be met. The documents below are the official and supporting materials that Mathski's marking is based on. Download and review them to understand exactly what examiners are looking for.

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IB Mathematics IA Guide

Official

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IA Mark Sheet & Rubric

Official

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IA Marking Checklist (SL)

Supplementary

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UPLOAD YOUR IA

Drop your IA here, or click to browse

PDF, DOCX or TXT · max ~4MB (compress if larger)

SELECT COURSE

SL·AI

Standard Level Applications

SL·AA

Standard Level Analysis

HL·AI

Higher Level Applications

HL·AA

Higher Level Analysis

Processing…

MARKING COMPLETE

Criterion Results

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out of 20

Red Flags

These marks are a first-pass drafting aid. All marks must be reviewed and finalised by the class teacher before submission. Coversheet comments are drafts — edit before pasting into any official form or IBIS. The teacher remains the marker of record.