Teachstone® was founded in 2008 to deliver the Classroom Assessment Scoring System® (CLASS®) nationwide and around the globe. ... Developed through years of research, the CLASS observation tool measures the interactions between teachers and children, which have been shown to drive learning and lifelong achievement. Teachstone helps organizations conduct classroom observations and provide professional development so that teachers improve and children learn more. Our online subscription service, myTeachstone, simplifies CLASS implementation by combining observation data with a robust library of CLASS resources and professional development. We also offer research-based, intensive coaching programs. read more