what is stem?

STEM stands for science, technology, engineering and mathematics. Most of us are familiar will all of these except engineering. As a former engineering major, and someone married to an engineer, I can tell you that engineering simply means going about solving problems. And that is exactly what we want our students to know how to do.
http://www.engineeringinteract.org/interact.htm
http://www.engineeringinteract.org/interact.htm