[Free Registration/Login Required] An informational text about tornadoes and the scientists who study them. A question sheet is available to help students build skills in reading comprehension.

An interactive timeline that students can read, watch and listen to in order to understand the scientist who tried and succeeded in measuring the speed of light.

Minutes become seconds in this lesson that focuses on time and measurement. This brief integrated lesson also explores science concepts regarding the relevance of a second. Fractions of seconds and decimals are also mentioned. The lesson...

Through interactive exercises and illustrated tutorials, students answer the fundamental questions: What is the reading on a thermometer the reflection of? What does temperature measure?

"Imagine a baseball dropped from an airplane flying at 30,000 feet; imagine that baseball reaching speeds of 120 MPH as it falls to the ground; and imagine you're under it!" How does hail form? How big can it get? Read more here about...