Developmental Environmental Rating Scale

The DERS is an environment rating scale analogous to the ECERS or the CLASS, but designed for environments such as Montessori (and others) which support the development of executive function, linguistic and cultural fluency, and social fluency and emotional flexibility.

Use of the DERS requires a one-day in-person or online training, an annual licensing fee, and access to an iPad tablet for downloading and using the DERS app.