00816cam a2200181 4500 51916181 TxAuBib 20090812120000.0 090812|||||||||||||||||||||||||||||eng|u 9781934032930 193403293X TxAuBib Heintzman, Lynn. RTI & DI: Response to Intervention & Differintiated Instruction : The Dynamic Duo. This DVD will help you learn how to effectively differentiate instruction in TIER 1 (core curriculum instruction) and TIER 2 (targeted instruction) stages of RTI. A range of strategies are demonstrated, such as the use of flexible grouping, support staff, continuous progress monitoring and data collection. 20090812. Hanson, Helene.