Mr. Leitner teaches STEM subjects in K-12 and wants to engage students more by facilitating learning rather than lecturing. The document describes a scenario in Apollo where students work together on a problem-based learning activity to launch a test rocket and meet requirements. Teachers comment that Apollo has potential to keep learning digital and social, link different subjects, and be reused over time while keeping students engaged. The document suggests Apollo could build on existing platforms and that games are engaging, provide feedback, and don't fail like other mediums. It quotes the head of Google saying games would make an incredible standalone business.