Perhaps the most valuable lesson I've learned when it comes to quest-based learning is that every quest needs to require a deliverable. The deliverable gives teachers a way to assess the student's learning and provides a jumping off point for the type of feedback that can hone understanding and/or confirm the concept connections that are made. So, I am applying this thinking to Minecraft as well by requiring a deliverable as a result of gameplay. Today, students logged on to their Minecraft-ready devices and generated a new Tutorial World II. Then, they logged on to Google Classroom to pick up their copy of the Google Doc deliverable. In the Google Doc, they documented their gameplay by taking screen captures of specific places, people, or accomplishments.
Here's a clip of how gameplay went today: