@inproceedings{7b73b5fc9f2745dd836a4e1e7d0f20a4,
title = "Activity-based learning elementary schools: implementing a core curriculum principle in elementary science education",
author = "U. Hameyer and {van den Akker}, J.",
year = "1992",
month = jun,
day = "22",
language = "English",
isbn = "90-365-0534-8",
volume = "1",
pages = "153--154",
editor = "Tjeerd Plomp and Jules Pieters and Andries Feteris",
booktitle = "European Conference on Educational Research (ECER92)",
publisher = "University of Twente",
address = "Netherlands",
note = "European Conference on Educational Research, ECER 1992, ECER ; Conference date: 22-06-1992 Through 25-06-1992",
}