IB Mathematics Applications & Interpretation (AI) HL Internal Assessment Example

The exploration has a clear overall structure with a visible progression from context, to modelling, to conclusion.

Most sections are relevant to the central investigation, and the main line of argument is easy to follow.

The document includes a clear introduction, body sections, and conclusion, which supports readability.

The argument becomes less coherent once several additional mathematical extensions are introduced without being fully justified by the research question.

Some headings, page references, and inserted visuals interrupt the flow rather than supporting it seamlessly.

A few sections add length without adding much explanatory value, which weakens conciseness.

Appropriate mathematical terms and symbols are used in many places, including regression, derivatives, adjusted R², and hypothesis testing.

The work makes effective use of several representations, such as tables, scatterplots, fitted curves, and algebraic working.

The main mathematical ideas are usually understandable because the purpose of each calculation is often stated.

Notation is not consistently accurate, and several expressions are written unclearly or incorrectly.

Some representations are cluttered or repeated, and not every graph adds new analytical value.

Language and numerical consistency break down in later sections, making parts of the work difficult to trust.