8Chang C Y, Sheu J P. Design and Implementation of Ad Hoe Classroom and eSchoolbag System for Ubiquitous Learning[ A]. Proceedings of IEEE International Workshop on Mobile and Wireless Technologies in Education ( WMTE 2002) ( eds. M. Milrad,U. Hoppe & Kinshuk) [ C]. 2002:8-14.
9Robert Talbert (2011). Inverting the linear algebra classr oom[ EB/OL]. http ://prezi. corrr/dz0rbkpy6tam/invert-ing- the-linear-algebra-classroom/, 2011-09 -21.