I study students’ math reasoning and design tasks to provide students with opportunities to expand their math reasoning. I also teach teachers to grow their students’ math reasoning. I currently work at the University of Colorado Denver as an associate professor of math education. I spent the first 13 years of my career teaching math to high school students in south central Pennsylvania. I have received awards for my teaching and research. Learn more at HthrLynnJ.com. Follow me on Twitter@HthrLynnJ.