Margret A. Hjalmarson

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– Concept inventories play a growing role in assessing student understanding in engineering curricula. A common application of concept inventories is a pre/post-test assessment in a course. For this reason, it is important to confirm the validity of any new concept inventory, i.e., to verify that the inventory measures what it is designed to assess. The(More)
A Model Eliciting Activity (MEA) is a real-world client-driven problem. The solution of an MEA requires the use of one or more mathematical or engineering concepts that are unspecified by the problem – students must make new sense of their existing knowledge and understandings to formulate a generalizable mathematical model that can be used by the client to(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.
2 Within upper-level applied mathematics, graphical representations play a significant role in conceptual understanding. Students need to be able to interpret and generate graphs as part of their mathematical reasoning. Signals and systems is a discipline within electrical engineering requiring the analysis and manipulation of different types of signals(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)
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)
Mathematical Representations 2 Introduction Representation received increased attention when it was added as a new process standard in the National Council of Teachers of Mathematics' (NCTM) Principles and Standards for School Mathematics (2000). " The ways in which mathematical ideas are represented is fundamental to how people can understand and use those(More)
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)
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