Kees heeft grote invloed gehad op het werk van het PMRI project in Indonesie. Hij was vanaf het begin betrokken en heeft daar met veel opleiders samen gewerkt. Zijn enthousiasme, scherpe inzichten, onderbouwde activiteiten en kennis werken daar nog steeds door.

Dear Kees

It was a great privilege to work with you and learn from you through PMRI movement in Indonesia. Your passion to advance the quality of mathematics education is truly inspiring. I felt blessed that we met again last year at ICME in Sydney and we even had lunch.

Rest in peace Kees.

Wanty

Kees, a good friend to start a small step in the world of education in Indonesia, especially PMRI.

That dedication will be an unforgettable memory.



-Martha Metrica-

I know Kees from my dad, when they did the PMRI project. After that, I worked on that project too, and he was a cheer up person. And now, PMRI/YPMIPA will always remember him.