Session 2, a 3 hour session, extends the formative assessment experiences in session 1a and offers participants an opportunity to engage in an innovative lab formative assessment activity. Teachers will continue to build a collaborative professional learning community with a connecting activity, thinking like a student, and a chemical thinking discussion. The session requires a lab classroom for teachers to experience the Pringle design challenge. Time will be spent exploring the Formative Assessment Enactment model more deeply. Session 2 focuses on Chemical Control and touches on three of the six overarching ACCT objectives.