great ideas and approach to the delivery of your scheme. The titanic is always one to generate interest and building it would be brilliant. Having a lesson or two where the students work on their group rules is something that could make the collaboration and teamwork run smoothly throughout the project. It is brilliant that you are using some pre-made lessons on the Minecraft Education website too well done. Having the research lessons and the design lessons are key. If they go straight to build mode they will have many problems and they have missed out on much of the learning. It could be a good idea to assign different parts of the build to different groups, this way the students do not end up arguing with one another and/or build in each others areas.