The Playful Learning Summit seeks to connect educators who share a passion for engaging and playful classroom practices. This year we are focusing on what happens 'inside the box' of learning playfully. As we design, research, and teach we are continually looking for meaningful feedback, understanding, and user experiences. There are many ways to seek this out. Together, we are asking questions that will bring us closer: How do I know students are learning? What do we look for? What helps us to measure the effectiveness, appropriateness, and potency of our playful learning spaces?