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According to the Every Student Succeeds Act (ESSA), Tier 4 evidence demonstrates a rationale in the form of a clearly articulated logic model, and current or future plans to study the effects of an intervention.
Well-defined logic model based on rigorous research
Planned effort to study the effects of an intervention.
Based on an initial review of instructional materials, Klett World Languages satisfies the criteria for ESSA Tier 4 for their Reporteros and Reporters Francophones programs.