I have been working with the NWEA test since 2008. After analyzing the reading substrands for our students, we noted that the Vocabulary substrand was always our lowest. Working exclusively with the NWEA Learning Continuum, I created RIT band-leveled affix stations. During the past 6 years, my students have consistently shown growth in this substrand area, and consistent understanding of the various affixes I have taught them. The RIT bands included span from 161 to 220.