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|Hertel serves the University of Wisconsin-La Crosse as an assistant professor in the mathematics department. He completed his Ph.D. in Mathematics Education at Illinois State University with the freely downloadable dissertation "Investigating the Purpose of Trigonometry in the Modern Sciences." Prior to his master's in mathematics at Illinois State University, Hertel taught high school mathematics for three years and worked as the assistant editor for the Journal for Research in Mathematics Education (JRME). His research interests include the teaching and learning of trigonometry, the use of technology in the teaching and learning of mathematics, the history of the enacted mathematics curriculum, the development of probabilistic reasoning, and the professional development of teachers of mathematics. See also his YouTube screencasts on spreadsheet basics, creating classroom materials with algebraic expressions using LibreOffice, sinusoidal regression using Graphmatica, and GeoGebra.|
|Levels:||High School (9-12), College|
|Resource Types:||Video, Tutorials, Topic Tools Miscellaneous|
|Math Topics:||History and Biography, Trigonometry|
|Math Ed Topics:||Technology in Math Ed, Professional Ed/Career Development, Curriculum/Materials Development|
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