Use one of the services below to sign in to PBS: You've just tried to add this video to My List. But first, we need you to sign in to PBS using one of the services below. You've just tried to add this ...

In Lesson 22, students read about Morse code (SEP.8) and use this method of communication to encode and decode their own messages (PS4.C). This knowledge helps students answer the Phenomenon Question: ...