A modern looking classroom or school environment is a great place to promote adding art to STEM education.

Combine ART with MATH. Architects and painters have been using the Fibonacci sequence, or the "Golden Mean", in their work for centuries. Math is essential in art.

Combine ART with SCIENCE. The color wheel itself is a prime example of how science works with art. 

Combine ART with ENGINEERING. The elaborate creations from DaVinci to the modern age combine art with science.