One of the main limitations of the current generation of computer-based tests is its dependency on the multiple-choice item. This research was aimed at extending computer-based testing by bringing limited forms of performance assessment to it in the domain of mathematics. This endeavor involves not only building task types that better reflect valued problem solving; but also creating an integrated set of supports including easy-to-use interfaces; tutorials to teach novice computer users how to negotiate those interfaces; tools that help test developers create items quickly; and mechanisms for scoring constructed responses more efficiently. The cornerstone of the effort's thinking about task generation is the notion of a problem schema, a set of variables and constraints that define a problem's deep structure. A version of a Test Developer's Assistant is being developed that would allow for item creation and tracking, information retrieval, and item analysis in computer-based performance assessment. (Contains two figures, four tables, and seven references.) (Author/SLD)