@inbook{a501976b6a394efc98126cb663850a76,
title = "Geometry in Kindergarten 1 and 2",
keywords = "Wiskunde en Informatica (WIIN), Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",
author = "{van den Heuvel-Panhuizen}, M.H.A.M. and A. Veltman and C. Janssen and J. Hochstenbach",
year = "2005",
language = "Undefined/Unknown",
isbn = "90-74684-25-4",
publisher = "Freudenthal Institute / SLO",
pages = "145--226",
editor = "{van den Heuvel-Panhuizen}, M. and K. Buys",
booktitle = "Young children learn measurement and geometry. A learning-teaching trajectory with intermediate attainment targets for the lower grades in primary school",
}