The memo summarizes Jessica Hollon's ongoing research project analyzing how practice in grades 3-5 can affect learners' brains and knowledge retention. The research questions include how classroom practice affects the brain, how much time teachers currently allocate to ungraded practice of reading and math, available curriculums for guided practice, and how teachers could restructure their schedules. The memo describes three research articles analyzed as secondary sources and a teacher survey used as the primary research tool.