A group of ten middle schooler boys is a bit tough to make an environment inviting to all players especially if so many of the young people playing are physically restless and tend to be loud.
The ideal DnD group is actually four players.
Splitting a group of ten or twelve in half is difficult, especially if they are all in the same room, being restless. How is that an environment that seems inviting to young females or quiet inviduals that seem to wait endlessley for their turn.
I need more DMs, and I need more DMs willing to be LARPing leaders. Because many of the active boys present need to express their energy and adventure at the same time. LARPing would be ideal for them.