Clueless Crosswords are an interesting crossword variation with 4 different levels. As the levels get harder fewer letters are provided to solve the code.
Level 1 = 13 letters
Level 2 = 10 letters
Level 3 = 7 letters
Level 4 = 4 letters

In this puzzle the wordlist is not provided at all. It is up to students to crack the code without the standard clues. The end result should be a puzzle filled with the words that are making up the wordlist. As the students discover a word they write it in the space provided alongside the puzzle.

An added motivation is the secret message that teachers can insert when the puzzle is created. If you don't want a message then tick the "No Message" checkbox and the message area will not be printed at the bottom of the worksheet.