Features of Effective Mathematics Instruction Part 2 Retention will focus on research proven instructional strategies that increase students' retention of their learning.  Participants will study the research behind the curve of forgetting and how retrieval practice can be used to move learning from short term to long term memory.  Teachers will draft a SLOT (spaced learning over time) instructional plan based on current retention instructional research. Several research validated instructional retrieval activities will be presented for teachers to consider as they develop their own learning retention plans.