Atbash is a good place to start with letter substitution: all you need is an A–Z alphabet written backward. Each puzzle uses the same letter pairs, so there is no key to keep track of. Decode a clue, then apply Atbash again to check it.
What to do
- Pair A with Z, B with Y, and continue inward.
- Replace each ciphertext letter with its partner.
- Preserve the visible word boundaries.
- Apply Atbash to the answer to check that the original clue returns.
Sample clue
OPEN THE BOXA–Z reversed; printed clue: LKVM GSV YLCLKVM GSV YLCThe answer is OPEN THE BOX. The first letter L maps to O because L has index 11 and 25 − 11 = 14, the index of O. No clue-specific key is needed.
Notice the letter pattern
Matching letters in a clue always have matching partners in the answer. Ask learners to circle repeated letters before decoding. If a pattern does not match afterward, check the copied letters before filling in a guess.
A quick extra question
Decode NZK.
Adjust the support, not the rule
For a first attempt, place a full reversed-alphabet chart beside the questions. Later, give only A ↔ Z and ask learners to complete the chart. The rule stays the same while they grow more familiar with the letter pairs.
Create and print your Atbash set
Choose how many questions you need, then keep the seed with your teaching notes. Using the same seed, Atbash worksheet type, question count, and generator version gives you the same set again. Select A4 or Letter and include the separate answer pages only when you want them.