Middle school social studies teachers are increasingly working on argument writing in their classrooms so that students can successfully write counterarguments that acknowledge competing perspectives about historical and social issues by the end of eighth grade. The authors' prior research indicates that eighth-grade students "can" grow…

Practicing teachers as well as researchers, mathematicians, and teacher educators have offered opinions and theoretical critiques of the multiple models used to teach integer arithmetic. Few studies, however, have investigated what students learn with models or empirically compared affordances and constraints of integer models. This led me to…