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Response to Intervention (RTI) is a multi-tier approach to the early identification and support of students with learning and behavior needs. The RTI process begins with high-quality instruction and universal screening of all children in the general education classroom.
DEFINITION of 'Producer Price Index-PPI'. A family of indexes that measures the average change in selling prices received by domestic producers of goods and services over time.PPIs measure price change from the perspective of the seller. family of indexes that measures the average change in selling prices received by domestic producers of goods and services over time.