EXPLORA-MORE-IUM: True to its name, the San Francisco Exploratorium--a Disneyland-like lab for learning--has a series of free STEM resources that educators can, well, explore. Activities, apps, worksheets, and more cover topics from the “sweet” science of candy to optical illusions. ELA and social studies may also benefit from lessons like The Evolution of Language and Exploring Paper (all about origami!). Trust us--the sheer number of freebies will have you saying, “Whoa.”
