Table 3.

Participants and sources of data used to improve the personas.

Participants	Sample size	Instrument
in-service mathematics teachers in upper secondary schools	n = 14	think aloud protocols
in-service mathematics teachers in upper secondary schools	n = 4	quasi-unstructured interviews
university faculty members	n = 3	quasi-unstructured interviews
pre-service mathematics teachers	n = 6	semi-structured interviews
upper secondary school students	n = 83	written feedback