 From Project Lead the Way, where they believe learning by doing helps every student in every grade be STEM successful. Learn more at pltw.org slash npr. From TimberTech, committed to providing sustainable decking materials in a variety of wood grains, textures, and colors to help expand a client's design potential. Project planning resources and cost calculators are at timbertech.com. And from the John D. and Catherine T. MacArthur Foundation at macfound.org.