In March 2015 we started by reporting on five products on our Efficacy website. Since then, our Efficacy program has become deeply embedded into the fabric of our company. We are constantly making gains to improve our products and services and remain committed to our own accountability. We are the only education company committed to efficacy with such rigor, and at such scale and depth.
Read more about the evolution of our Efficacy reporting.
Our product efficacy reports are being updated to include new research that we've completed over the last year. These reports will be available by March 2018. Please check back!