I was trained in the SIOP method and have used it as a foundation for an instructional paradigm for 17 years. This short article by Stephen Krashen,
https://www.sdkrashen.com/content/articles/2013_siop_research_support_claims.pdf
made me take pause and think more carefully about SIOP claims as well as what aspects of SIOP may or may not be useful in regards to language acquisition.
