Assign this text to deeply engage your students!

Actively Learn provides free ELA, science, and social studies digital content—short stories, primary sources, textbook sections, science articles, novels, videos, and more—and embeds them with standards-aligned assignments to assign immediately or customize for your students.

Whether you’re looking for “The Tell-Tale Heart,” The Hate U Give, “The Gettysburg Address,” or current science articles and simulations, Actively Learn is the free go-to source to help you guide your students' growth in critical thinking all year.

Teaching Time dilation

Time dilation

As the velocity of an object approaches the speed of light it appears to move more slowly through time to a stationary observer.

CK-12 (High School)

ESSENTIAL QUESTION:

How does the speed at which an object is traveling affect the perceived elapsed time by a stationary observer?
STANDARDS:
RST.2 - Main Ideas

DEPTH OF KNOWLEDGE (DOK) LEVELS:

2
Assign this text to your students for free!