Coding and Decoding messages.
I have used the following program to set up a treasure hunt for grade 4 using pigpen cipher, reverse alphabet cipher, morse code polybius cipher etc. It was a lot of fun watching them work with a partner to work out the necessary decoding strategies to solve the message and find their next clues. https://www.simonemadeit.com/secret-codes-for-kids-top-secret-messages/
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