TY - CHAP T1 - How Do We Get the Pieces to Talk? An Architecture to Support Interoperability between Educational Tools AU - Harrer, A. AU - Pinkwart, N. AU - McLaren, B. M. AU - Scheuer, O. TI - Proceedings of the 9th International Conference on Intelligent Tutoring Systems (ITS) PY - 2008 PB - Springer Verlag IS - 5091 ER -