Used in over 1,600 districts.

Codes

Bulls and Cows

How quickly can you break the numeric code?

Shift Cipher (Codes Part 1)

Shift Cipher (Codes Part 1)

Let’s encode and decode secret messages like Julius Caesar!

Jotto

Who can guess the codeword first?

Factors and Codes (Episode 1)

Factors and Codes (Episode 1)

Let’s use factors to encode and decode words.

Pig Pen Cipher (Codes Part 2)

Pig Pen Cipher (Codes Part 2)

Let’s encode some secret messages with a cipher that was actually used during the American Civil War!

Zig Zag Cipher (Codes Part 3)

Zig Zag Cipher (Codes Part 3)

Let’s try a cipher that doesn’t substitute new letters or shapes. We just mix things up.

Path Cipher (Codes Part 4)

Path Cipher (Codes Part 4)

Now let’s try the Path Cipher – a cipher that mixes things up even more than Zig Zag did.

Factors and Codes: First Names (Episode 2)

Factors and Codes: First Names (Episode 2)

Scrambled up somewhere in 161,000 is a first name. Can you find it!?