On October 14 and 15, and December 8, 2021, the Board on Science Education at the National Academies of Sciences, Engineering, and Medicine held a virtual Summit entitled Taking Stock of Science Standards Implementation. Participants explored the landscape of state science standards implementation, identified where there have been successes and challenges, and determined next steps and the resources needed for continuing or re-invigorating implementation efforts. This publication summarizes the presentations and discussion of the event.