Sybilla Beckmann
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Andrew Izsák,
Torrey Kulow,
Sybilla Beckmann,
2019
.
Sybilla Beckmann,
2014
.
Bradley Witzel,
Jon R. Star,
Russell Gersten,
2009
.
Sybilla Beckmann,
Nicholas K. Oppong,
Elliot Gootman,
2014
.
Douglas H. Clements,
Sybilla Beckmann,
Karen C. Fuson,
2010
.
Sybilla Beckmann,
S. Beckmann,
2011
.
Kenneth R. Koedinger,
Asha K. Jitendra,
Sybilla Beckmann,
2012
.
Sybilla Beckmann,
Karen C. Fuson,
K. Fuson,
2013
.
Sybilla Beckmann,
2014
.
Sybilla Beckmann,
2008
.
Rui Kang,
Sybilla Beckmann,
Dean Stevenson,
2018
.
Andrew Izsák,
Sybilla Beckmann,
Andrew Izsák,
2019,
Educational Studies in Mathematics.
Andrew Izsák,
Sybilla Beckmann,
Torrey Kulow,
2018,
Mathematics Teaching in the Middle School.
Sybilla Beckmann,
S. Beckmann,
2005
.
Sybilla Beckmann,
S. Beckmann,
2004
.
Sybilla Beckmann,
Christy Desmet,
Victoria Davion,
2002
.