by Lior Zitman
Bridges have changed greatly over the years. Thanks to advances in building materials and machinery, building a bridge is now more precise than ever before.
Nevertheless, all these modern marvels come down to a few simple physics principles. Our technologies may evolve, but some things—like physics—never change!
Every bridge, regardless of its form, must constantly balance the opposite forces of tension and compression. How these forces work together is what makes each bridge type unique. Read the rest of this entry »
Posted by Donna Giachetti 
By Priscilla Robinson
Looking for a free STEM resource to share with your students? Here’s our selection. Some websites offer ready-to-go lessons… others share exciting interviews with young people involved in STEM fields. All of them are worth a visit!
You already know that STEM learning is everywhere these days. The term “STEM” had its origins in the 1990s at the National Science Foundation. Since then, it has become a buzzword for all sorts of events, policies, or programs involving one (or several) of the acronym’s disciplines—namely, Science, Technology, Engineering, or Math.