Concept:A portfolio is a purposeful collection of student work that shows learning progress and achievements in mathematics.
Explanation:A mathematics portfolio should include diverse evidence of learning, not just test scores or notebooks.
It typically contains assignments, worksheets, lab activities, model write‑ups, posters, cards, and new problem attempts.
This variety helps assess both understanding and creativity in mathematics.
Option C lists all these components correctly, while options A, B, and D are incomplete or too narrow.
Answer:C. record of assignments, worksheets, maths lab activity record, write‑up of any mathematics model, mathematical posters and cards, any new type of problem attempted or generalisations made, etc.