As I ponder the 20 years of previous SIGCSE’s I have attended, ACM’s annual Special Interest Group on Computer Science Education technical symposium, I’m struck by the promise of number 21. A recent look at the program showed a wide array of sessions directly related to Computer Science Principles (CSP) and Exploring Computer Science (ECS) and other sessions indirectly related because of their relevance to secondary school computer science teachers. There
