Margret A. Hjalmarson

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This paper reports on a STEM teacher leadership program to support teachers in creating initiatives within their schools for STEM learning for all students. Teachers were recruited from across the state to represent a range of environments (rural, urban, suburban), across K-12, and including math and science. The program included a summer workshop and(More)
In this paper, we study two forms of in-class assessments, group exercises and individual exams, assigned in a junior level signals and systems course. We examine both the assessments themselves and students' work in response to these assignments. Our goals are to better understand how students apply mathematical foundations to signals and systems concepts,(More)
1 John R. Buck, ECE Dept. & SMAST, University of Massachusetts Dartmouth, N. Dartmouth, MA, 2 Kathleen E. Wage, ECE Dept., George Mason University, Fairfax, VA, 3 Margret A. Hjalmarson, College of Education and Human Development, Fairfax, VA, 4 Jill K. Nelson, ECE Dept., George Mason University, Fairfax,(More)
Results of analysis of responses to a first-year undergraduate engineering activity are presented. Teams of students were asked to develop a procedure for quantifying the roughness of a surface at the nanoscale, which is typical of problems in Materials Engineering where qualities of a material need to be quantified. Thirty-five teams were selected from a(More)
This paper examines students' interpretations of open-ended convolution tasks in order to understand typical approaches students use to arrive at solutions. The goal of the study is to determine which solution approaches are more or less effective for students, as well as understand how signals and systems novices interpret open-ended problems in a course.
The validity of the Signals and Systems Concept Inventory (SSCI) was evaluated by comparing students' performance on the SSCI to open-ended final exam problems. An assessment instrument is said to be valid to the extent that it measures what it was designed to measure. The SSCI was designed to measure students' understanding of core concepts in(More)
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