Clarify that Zach's use is for extension

Author: ethanwhite

paper.md

@@ -105,7 +105,7 @@ The modular design of the course is supported by "assignments" that automaticall
 
 The online materials for the course are designed to be accessible to all learners. The site has been reviewed using the [WAVE web accessibility evaluation tool](https://wave.webaim.org/) and [pa11y](https://pa11y.org/), and all videos have been manually captioned by the instructor presenting the material. In order to ensure that accessibility is maintained as the site is continuously updated, we use [pa11y-ci](https://github.com/pa11y/pa11y-ci) and continuous integration ([GitHub Actions](https://github.com/features/actions)) to automatically scan all pull requests for accessibility.
 
-This general infrastructure for modular, collaborative, and accessible course development is useful regardless of the content of the course. For example, one of the authors (Zachary Brym) uses the same infrastructure for teaching a [course on agroecology at the University of Florida](https://trec-agroecology.github.io/introducing-agroecology/). We hope that open courses on other topics can be built on this infrastructure to support the broader adoption of collaborative course development for college and university classrooms.
+This general infrastructure for modular, collaborative, and accessible course development is useful regardless of the content of the course. For example, one of the authors (Zachary Brym) uses the same infrastructure for  [extension programs on agroecology at the University of Florida](https://trec-agroecology.github.io/introducing-agroecology/). We hope that open courses on other topics can be built on this infrastructure to support the broader adoption of collaborative course development for college and university classrooms.
 
 # Course Development Background