A former high school biology and chemistry teacher, Dr. Lyon teaches secondary science candidates and conducts research on how science instruction and formative assessment can support English Learners, often collaborating with local science teachers. In collaboration with other science teacher educators, he has redesigned science method courses and analyzed how candidates are prepared to teach science to ELs through NGSS and Common Core. Dr. Lyon has published 15 articles/book chapters, published a book on teaching science to ELs, and given 40 presentations, including at CSTA and NSTA.