[Rick TYler]

If you have students who aren't contributing, there are two good answers and one bad one. First, the best solution:

Senior team members each take one or two rookies under their wing and teach them how to be productive. It's called "leadership."

The second-best solution:

Your adult mentors solve the problem by spending time bringing the new students up to speed. This is suboptimal because it means that they are not focusing on strategy and program management. Mentors should only handle this if the older students are unwilling or incompetent to provide leadership.

The worst solution:

Make the rookies feel uncomfortable. Make sure you only give them scut work to do. Make fun of them. Leave them out of strategy and design discussions. Let them know you think they are inferior. Then, they will drop off the team and you won't have to worry about them anymore! Of course, in a couple of years your team won't exist any more, but at least you won't have to deal with those annoying rookies.