Secret Messages

1. Secret Messages

2. LEARNING OBJECTIVE
Understand how to store
and look up values from
a list.

3. LIST
(Also known as an array)
A way of storing more than
one thing under one
variable name.
My magic potion contains
hair, knotgrass and
leeches.

4. Here’s a list of students.What will each print
statementdo?

5. Another way to add items is using the‘append’
command. Use thisto add some more students.
Make sure you print your list of students againto
make sure your code has worked!

6. CAESAR SHIFT
A well-known cipher to encode
a piece of text by replacing
one letter of the alphabet
with another a chosen number
of places (shifts).
For example, a shift of 2
means “A” becomes “C”:
A B C D E F G H I K L. . .

7. TASK
Cut out and make your
own Caesar Cipher Wheel
using your worksheet.
Use your wheel to create
a secret message for the
person next to you to
decode.

8. Can you decode this
secret message?
s vyfo mywzedob zbyqbkwwsxq
Are there any clues to
help us work out the
shift number?

9. NEXT TASK
Log onto
https://www.codecademy.
com/learn/python
and continue the Python
course from where you
finished last lesson.

10. What is happeninghere?
Create your own encryption program and testit
out.