GDC Skills for IB Maths: The Calculator Features That Win Marks in Paper 2

In IB maths, the graphic display calculator (GDC) is not optional. All AI papers require one, and so do AA Papers 2 and 3 – only AA Paper 1 is calculator-free. Yet many students use a powerful GDC like a basic calculator and lose time and marks. A few hours spent learning the right features can be worth more than weeks of extra content revision.

Choosing a model? See our IB maths calculator buying guide. Whatever you use, check with your school that it meets the IB's calculator rules for exams – calculators with computer algebra systems (CAS) are not permitted.

The features every IB student should master

Graphing

• Graph functions and set a sensible window quickly.
• Find intersections, zeros, maxima and minima from the graph.
• Use a table to explore values and spot patterns (very useful in Paper 3).

Solving

• Equation and polynomial solvers.
• Simultaneous equations (and, for AI HL, matrices).

Calculus

• The numerical derivative at a point.
• Definite integrals – including areas and, for kinematics, distance using |v|.

Statistics and probability

• One- and two-variable statistics; regression with r.
• Binomial and normal distribution functions, including the inverse normal.
• For AI: χ² and t-tests.

Finance

• The TVM (financial) solver for compound interest, depreciation and loans.

Writing GDC working so it earns marks

The markscheme cannot see your calculator screen. A bare answer that is wrong earns nothing; a clear setup can still earn method marks. Write:

• What you solved or graphed: "Solving 3e^(0.2x) = x + 5 graphically, x = 4.21".
• The model and parameters for distributions: "X ~ N(170, 8²), P(X > 180) = 0.106".
• Inputs for the TVM solver: "N = 60, I% = 7.5, PV = 500000, FV = 0, P/Y = C/Y = 12".
• A sketch when a question asks for one – copy the key features (intercepts, turning points, asymptotes) with labels.

Avoid writing calculator syntax like "normalcdf(180, 1E99, 170, 8)" as your only working – write the mathematical statement.

Settings that cause silent errors

• Radians vs degrees. Calculus and most trig in AA uses radians; triangle problems often use degrees. Check before every paper.
• Rounding. Give final answers to three significant figures unless told otherwise, but keep full accuracy in intermediate steps – use stored values, not rounded ones.
• Window settings that hide an intersection or a second solution.
• Stat plots or old lists left on from earlier work.

How to practise GDC skills

• Learn each feature with its topic, not all at once before the exam.
• Make a one-page GDC checklist for your own model – keystrokes for each feature.
• Do Paper 2 questions twice: once quickly with the GDC, once writing the full working as for the examiner.
• For AA students, keep practising Paper 1 by hand – the GDC must not replace algebra skills.

How Maths Bodhi helps

We teach the GDC on the student's own model, topic by topic:

• A short check of which features the student already uses – and which they don't know exist.
• Feature practice inside real IB questions, with the written working the markscheme expects.
• A personal GDC checklist built with the student.
• For AA students, a balance of no-calculator fluency and GDC method.

Ajay Vatsyayan (M.Tech, 14+ years teaching maths) teaches IB DP maths at Maths Bodhi and has taught students from schools across Gurgaon, including Scottish High International School, Shiv Nadar School, Amity Global School and Lancers International School. Maths Bodhi is independent and not affiliated with any school. Read Ajay's profile, or see our IB exam maths support and IB maths doubt solving pages.

Home sessions across Gurgaon – including Golf Course Road and Sector 43 – or online. Book a free demo class.

Related: IB maths probability distributions, sequences, series and financial maths and the IB DP maths guide for Gurgaon families.

Calculator requirements verified against the current IB AA and AI guides by the Maths Bodhi team (October 2026). Teaching approach reviewed by Ajay Vatsyayan.