Teachstone’s mission is to support teaching and learning through proven, evidence-based education programs, including the Classroom Assessment Scoring System™ (CLASS™) observation tool and related professional development tools.

Teachstone was founded in 2008 by two of the CLASS™ tool authors, Bob Pianta and Bridget Hamre. Underlying the Teachstone focus on the CLASS™ observation tool is our commitment to taking research-based supports and making them available and accessible to those working in the field.

Teachstone gratefully acknowledges support from the Foundation for Child Development for the development and implementation of the company’s business plan.