 In addition, Ellis has co-authored three books for the Essential Understandings Project book series by the National Council of Teachers of Mathematics, one published in 2010 one in 2011, and one in 2012.Ellis is a principal investigator on a variety of research projects, and has received numerous grants from the National Science Foundation, as well as other funding agencies.Ellis was awarded the "Early Career Publication Award" from the Research in Mathematics Education special interest group of the American Educational Research Association in 2008.