Back to School Secret Messages include several encrypted messages that can be decoded using a key:

• Messages contain a mix of uppercase and lowercase letters, which correspond to each other.
• Encoded phrases include "WELCOME BACK TO SCHOOL," "LEARNING IS FUN," and "OUR CLASS IS AWESOME."
• The messages involve deciphering symbols to reveal words like "AWESOME" and "CLASSIFY" in reverse.

The material also features activities like finger spelling and word puzzles:

• Activity sheets include words to be deciphered such as "SHARK," "TRUCK," "INDIANA," and more.
• There are word search puzzles with words like "NAME," "SIGN," "TEACHER," and "LANGUAGE" hidden in different directions.