TY  - CPAPER
TI  - DEVELOPMENT AND VALIDATION OF A TEST INSTRUMENT FOR ASSESSING FUNCTIONAL THINKING IN SECONDARY EDUCATION
AU  - Greefrath, Gilbert
AU  - Bommert, Emilia
AU  - Kirsten, Katharina
T2  - Proceedings of the International Group for the Psychology of Mathematics Education, Volume 1
PB  - Psychology of Mathematics Education (PME)
PY  - 2026
SP  - 531
EP  - 538
SN  - 2790-3648
KW  - functional thinking
KW  - test instrument
KW  - three-dimensional model
UR  - https://www.igpme.org/publications/RR_PME49/rr/PME49_RR_227_Greefrath_G/
ER  -