The document discusses a study that investigated whether using math journals increases students' retention of math terminology and strategies. The study was conducted in a 1st grade classroom where 19 students used math journals for one chapter and did not use them for another. Data showed that students' average test score increase was 23% with journals and 37% without, suggesting journals may not aid retention. However, journals can be a good assessment tool and way to differentiate instruction. Educators should consider time constraints and communicating the journal process to families.