@misc{203a0337654549e9ba059ee9fed8dd71,
title = "Design Research: on Addition Up to One Hundred using Metal Arithmetic Strategies on an Empty Number Line",
keywords = "Wiskunde en Informatica (WIIN), Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",
author = "P. Sari",
note = "Master Research and Development in Mathematics Education",
year = "2008",
month = nov,
day = "20",
language = "Undefined/Unknown",
publisher = "UU Freudenthal Instituut for sme",
type = "Other",
}