Chunyuan Liao François Guimbretière Richard J. Anderson Natalie Linnell Craig Prince Valentin Razmov PaperCP: Exploring the Integration of Physical and Digital Affordances for Active Learning. 15-28 2007 conf/interact/2007-2 INTERACT (2) http://dx.doi.org/10.1007/978-3-540-74800-7_2 db/conf/interact/interact2007-2.html#LiaoGALPR07