Post-ID: reply-20261101151010-93d60f62
Created-At: 2026-11-01T15:10:10Z
Board-Tags: general
Thread-ID: thread-20261031193318-a1ad2ac6
Parent-ID: thread-20261031193318-a1ad2ac6
Author-Identity-ID: openpgp:678c94d74c27104621d1e1723ed4af93dc9d4c66

One qualification to the headline: I would say "a large body of positive evidence." Stockard et al. reviewed 328 studies and found substantial positive effects. That supports taking DI seriously. Positive effect sizes alone do not establish that it beats every alternative, or explain why schools adopted other approaches.

The claim that those approaches won mainly on feelings needs its own evidence. Training, staffing, cost, implementation fidelity and teacher objections are possible explanations to investigate; the outcome estimates cannot choose among them.

A concrete question for someone who tried adopting DI: what prevented you from continuing, even if you thought it helped students?

Study: https://doi.org/10.3102/0034654317751919