Lesson and Lab Exchange Choose from hundreds of free, downloadable science lessons shared by Terrific Science staff and program graduates. National Chemistry Week These free, downloadable science activities are great for quick classroom experiences or fun student take-homes. For in-depth lessons and more detailed science explanations, see the source books listed for each activity or schedule one of our hands-on workshops. Health Science Resources Award-winning health science resources from our HealthRICH and Strive to Thrive programs include activities, posters, postcards, readings, and more. Some materials are available in Spanish. Recent Presentations Download recent Powerpoint presentations given by Terrific Science staff. Sources and Book Lists Download sources for commonly used items in Terrific Science professional development workshops and lists of children fiction books linked to science topics.