Tom Livak

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Middle school mathematics teachers are often forced to choose between assisting students' development and assessing students' abilities because of limited classroom time available. To help teachers make better use of their time, we are integrating assistance and assessment by utilizing a web-based system ("Assistment") that will offer instruction to(More)
The eXtensible Tutor Architecture (XTA) was designed as a platform for creating and deploying many types of Intelligent Tutoring Systems across many different platforms. The XTA presently has support for state graph pseudo-tutors and JESS model-tracing cognitive tutors, in both a client and server context. Supported interfaces are presently Java Swing /(More)
Heffernan et al. (2001) have developed an online intelligent tutoring system (the ASSISTment system) for eighth grade mathematics that is explicitly aligned to state exam standards. In this paper we assess the utility of the DINA model (Junker and Sijtsma, 2001) for diagnosing knowledge components (KC's: skills, pieces of knowledge, and other cognitive(More)
The ASSISTment system is an online benchmark testing system that tutors as it tests. The system has been implemented for the content of the 8 th grade Mathematics portion of the Mas-sachusetts Comprehensive Assessment System (MCAS) exams, has been developed and tested in Massachusetts middle schools, and is being adapted for use in other states such as(More)
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