Teachstone focuses on improving teacher-child interactions in educational environments, particularly in early childhood and K-12 education. The main product offered is the Classroom Assessment Scoring System (CLASS), which is a tool designed to measure and enhance the quality of interactions between teachers and students. CLASS works by providing a structured framework for observing and scoring classroom interactions, allowing educators to identify areas for improvement. Teachstone differentiates itself from competitors by offering a comprehensive suite of products and services, including professional development programs and certification for CLASS observers, which support the effective implementation of the CLASS framework. The goal of Teachstone is to enhance the quality of education by fostering better interactions in the classroom, ultimately leading to improved student outcomes.