The Digits
Telling Time: The Digits
Time to teach your students how to read a clock? This resource is here to help! Engaging young mathematicians with two fun videos and a series of hands-on activities, these lessons offer a multimedia approach to teaching this important...
CK-12 Foundation
Ck 12: Physical Science: Electronic Signal
[Free Registration/Login may be required to access all resource tools.] Covers electronic signal, how an electric current can be used to send an electronic message, what analog and digital signals are, and the difference between them.