ESSA Tier IV ("Demonstrates a Rationale") indicates that a product has a well-specified logic model or theory of action grounded in high-quality research, even if the product itself has not yet been the subject of a formal efficacy study. This tier is particularly relevant for newer or innovative EdTech products that are built on established learning science but are too new to have accumulated the longitudinal research required for higher tiers. The 0 products on this page carry an ESSA Tier IV rating.
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Yes — ESSA Tier IV qualifies as "evidence-based" under ESSA, making products eligible for use with federal Title funds. However, the law also requires that schools using Tier IV products have an ongoing effort to build a more rigorous evidence base over time.
Tier III requires at least one correlational study showing positive outcomes for the specific product. Tier IV requires a credible logic model grounded in broader research, but not necessarily a study of the product itself. Tier III provides stronger direct evidence; Tier IV is appropriate for newer products with a strong research-based design.
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