The student consistently uses correct mathematical notation, symbols, and terminology throughout the internal assessment, ensuring clarity in expressions for thickness, length, and width. Key terms and variables are well-defined when first introduced, and the main concepts related to folding paper are clearly described in the introduction. The student effectively employs multiple forms of mathematical representation, including formulae, diagrams, and tables, to enhance understanding of the investigation. All mathematical calculations are thoroughly explained, with accuracy specified for rounded values, and results are rounded only at the end of the calculation thread. Additionally, the student adopts a deductive method, providing logical proofs where appropriate, and ensures that all graphs, tables, and diagrams are properly labeled and referenced.