RadioActive Middle school can be rough. Los Siete guides middle school boys through it In middle school, you’re thrown into a completely new environment with hundreds of people you’ve never met before. Your body and brain are changing. You’re starting to learn how to grow up. This transition can be hard on young teens. They can fail in classes and have issues outside of school. However, at Chinook Middle School in Sea-Tac, a group called Los Siete provides guidance and support for middle school boys.