# Teachstone

> Teachstone turns research on teacher-child interactions into CLASS observation tools, observer certification, coaching and professional learning software. Its customers include Head Start programs, school districts, early childhood providers and public education systems in the United States and abroad.

- **Founded:** 2008
- **Headquarters:** Charlottesville, United States
- **Founders:** Robert Pianta (Co-founder; CLASS lead author; board member), Bridget Hamre (Co-founder; CLASS co-author; board chair)
- **Products:** CLASS, CLASS 2nd Edition Pre-K-3rd, CLASS 2nd Edition Infant-Toddler, CLASS Quality Improvement Subscription, Observer training and recertification
- **Notable:** Certified B Corporation since January 2021; B Lab lists an overall impact score of 88.2., CLASS is used in Office of Head Start program monitoring., Launched CLASS 2nd Edition in 2022 and the unified Infant-Toddler suite in August 2025.

## Products & services

- **CLASS** — Research-based observation framework for educator-child interactions, with age-specific tools from infancy through secondary school.
- **CLASS 2nd Edition Pre-K-3rd** — Updated observation framework and learning supports for preschool through third grade.
- **CLASS 2nd Edition Infant-Toddler** — Unified infant-toddler observation, certification and professional learning suite launched August 1, 2025.
- **CLASS Quality Improvement Subscription** — Updated myTeachstone platform combining observation data collection, reports, learning resources and CLASS Connect courses.
- **Observer training and recertification** — Training and reliability testing for CLASS observers; certifications require annual renewal.
- **CLASS 1:1 Video Coaching** — Ten-month coach-development program using classroom video, facilitated training and practice-based coaching.
- **CDA with CLASS** — Coursework supporting the educational requirements of the Child Development Associate credential, with CLASS concepts embedded.
- **CLASS Environment** — Companion measure of 29 environmental elements that support classroom interactions.
- **Observation services and affiliate training** — External observations, coding support and programs that train organizations to deliver CLASS training internally.

## Achievements

- Certified B Corporation since January 2021; B Lab lists an overall impact score of 88.2.
- CLASS is used in Office of Head Start program monitoring.
- Launched CLASS 2nd Edition in 2022 and the unified Infant-Toddler suite in August 2025.
- Named an Early Childhood & Pre-K Education finalist in the sixth annual Anthem Awards in October 2026.

## Latest updates

- **2026-10** — Announced an Anthem Awards finalist designation on October 20; winners were scheduled for November 5.
- **2026-10** — Published its perspective on proposed Head Start regulations on October 16.
- **2026-08** — Announced Yvonne Cowser Yancy as chief people officer.
- **2025-08** — Released the unified CLASS 2nd Edition Infant-Toddler suite.
- **2025-03** — Appointed Karlo Young CEO; Bridget Hamre moved to board chair.

## Links

- Website: https://teachstone.com/
- LinkedIn: https://www.linkedin.com/company/teachstone/
- Twitter/X: https://twitter.com/Teachstone
- YouTube: https://www.youtube.com/watch?v=XPVDJ9s2HE8
- Facebook: https://www.facebook.com/Teachstone

---

Profile page: https://yespress.io/teachstone
Published by YesPress — https://yespress.io
Last updated: 2026-10-25