The SIGCSE-MEMBERS mailing list of the ACM Special Interest Group in Computer Science Education is the main forum for educators worldwide to discuss computing education research, pedagogy, and curriculum. In early 2022 it was abuzz with several connected movements: growth mindset, proficiency (aka mastery) learning, grading for equity, and specifications grading. Each of these is an important step toward the Holy Grail: A's for All (as time and interest allow); the "A"line doesn't move, but every student should be given an opportunity to achieve proficiency and earn it, as long as they are willing to put in the time and effort it might take. The mantra is not "fixed time, variable learning", but "fixed learning, variable time". Many of us have been associated with this movement for quite some time, and it is only now that the software, curriculum, and policies have evolved to the state that we are ready to demonstrate how it works "at scale". The goal of this demo is to highlight the software infrastructure required for educators to achieve it in their courses and institutions; this is associated with the workshop Achieving "A's for All (as time and interest allow)".