LETRS is via Sopris learning which states on their website,
Sopris, a Cambium Learning™ company, was founded on the belief that all students can achieve. The company specializes in providing research-based curricula, targeted interventions, assessment, positive school climate resources, and professional services to educators working with preK-12 students who have special needs.
Committed to scientifically based practices, Sopris only publishes programs that are theoretically sound and proven effective with students who are at risk. In addition, Sopris West provides comprehensive services, including in-depth staff development to ensure a quality teacher in every classroom, and partnerships with states and school districts dedicated to schoolwide reform through its Closing the Achievement Gap Initiative.
Mission StatementTo positively impact the education of children and youth, particularly those at risk for school failure, by providing educators and parents with practical, affordable, and theoretically sound products, programs, and professional services that promote safe, civil, and achieving environments.
The authors/creators of LETRS are Dr. Louisa C. Moats, Ed.D.
Ah ha! Before delving into "research", Lousie Moats works with neuro psychology- she is a psychologist and studied human development. I'm sorry, but psychology does not belong in education, it can be used for evil, mind control, shaping of children. No no no. And gasp she is a grad. of Harvard. (Seems every "change agent" went to Harvard, Stanford, U of Chicago...the big liberal pricy universities all the elite/status quo attended.) Maryann Wolf, another author not listed here but on the website and below as "research" ; she is a Harvard grad and psychologist as well.