When it comes to managing uncommunicative teenagers, your home is the ideal place to get this surly age group to start talking to you. The second most ideal place is your car, essentially the family home on wheels.
A well-known fact is that everyone feels comfortable in anyone's kitchen, even young adults. So set up an environment that puts teens at ease around a kitchen island or countertop, and organize a project making gnocchi together. Making and forming gnocchi will be a learning experience, no matter how expert you are already. (If you are frightened by the prospect then get the Academy to do the teaching.)
Here's what happens when you are creating something with your hands and concentration is needed: brains are 75% occupied with task at hand, which makes the other 25% of motor functions relax. Don't ask the Dean why but she knows this is a proven fact after raising four of her own children. Talking subjects can be about the steps to making the gnocchi, a completely non-threatening topic which offers lots of areas for delving into -- food, culture, nutrition, taste. Not to mention that a hands-on experience is always more fun to do with someone else, because you become pals in a project instead of adversaries.
If you can get into a routine (maybe once a month) a one-on-one tradition may start and memories will be made, believe us! Once a skill becomes more familiar and less scary, there is always opportunity for laughing at mistakes which will definitely occur, being proud of the final product, and creating a delicious dinner. With patience, the space will arise for talking about other, more personal subjects...maybe not on the first try but eventually. Number one key: don't ask penetrating questions, which moms can be expert at doing.
Nightly dinners are the time and place to become an active listener. Ask questions that need more than a yes or no response, but remember, not too personal! The big mistake is to do all the talking or give too many opinions. Allow these teenagers of yours time to answer a question so they can formulate what they want to say and how. Let these guys be the smartest ones in the room. Every person needs that.