The document summarizes a study that examined the effects of focused academic vocabulary instruction on underperforming math students. The study taught academic math vocabulary to the lowest performing 6th grade math class using methods from Marzano's program. It found that the students' test scores increased by 93% compared to only a 33% gain found in previous research. Student surveys also showed improved perceptions of their math abilities after receiving vocabulary instruction. The study demonstrated benefits of academic vocabulary teaching, especially for struggling learners.