  PhysPort (www.physport.org) has become the go-to place for physics faculty to
learn to apply research-based teaching and assessment in their classrooms.
Usage has doubled every two years since the site was released in 2011, and 20%
of all U.S. physics faculty are now verified educators on PhysPort. The lead
author conceived of PhysPort in 2007 after meeting many physics faculty
interested in incorporating results of physics education research (PER) in
their classrooms but with no idea where to start. At the time, most PER results
were buried in research journals not accessible to ordinary physics educators,
and there was no central place to learn about results and implications for
classroom practice. Throughout its development, PhysPort has been based on user
research: we interview physics faculty about their needs, design the site based
on those needs, and conduct usability testing to see how we meet those needs.
PhysPort is a joint product of the American Association of Physics Teachers
(AAPT) and Kansas State University (K-State), with contributions from many
universities, funded by the National Science Foundation (NSF), and a library
within the ComPADRE.org digital library. The site (originally called the PER
User's Guide) was first funded by an NSF grant in 2009 and released in November
2011. This article presents an overview of resources on PhysPort, discussion of
research and development of the site, and data on the continuing growth of site
usage.
