To support teachers in implementing ambitious reform efforts, professional developers and teacher educators need to know more about teachers' thinking about argumentation. Specifically, there is a need to understand more about teachers' views and evaluations of "students'" mathematical arguments as they play out "in practice."…

The paper describes the task matrix procedure for determining the task content for work samples in entry-level occupations within a specified occupational group or industry. The procedure enables the work sample developer to systematically obtain and organize task information from the Dictionary of Occupational Titles in order to identify those…

Although predictive validation is the primary method of justifying a particular work sample for use as an assessment device, content validation is being recognized as an alternative strategy. Confusion exists over whether content validity should refer to the representativeness of the work sample, in terms of tasks to be performed, or behavioral…

Four moderately to severely mentally retarded adolescents used a cassette player to self-administer auditory prompts in two of three task areas: vocational assembly, use of a washing machine, and food preparation. The procedure included acquisition, faded assistance, and maintenance phases. All four students learned and maintained performance of…