Working on the lines of the treble clef staff? Here's a fun way to have your students use their knowledge and solve a puzzle with Mystery Word! The Mystery Word package includes 50 challenging words and/or phrases that are spelled using the musical letters (A,B,C,D,E,F, and G) of the treble clef staff. Blank letter boxes are below the note on the staff for the students to fill in. Some words and phrases are easy, but some get pretty difficult! Included are three files: The teacher version, a PDF file with 50 pages in PDF format to use as a class activity. The student version, a PDF file you can print out with 25 pages, 2 puzzles to each page you can individual give to students. (If printed out and copied back-to-back, it only runs 13 pages per booklet) The answer key (just in case a substitute teacher needs it) ;) You can use this as a warmup to your lesson, or a lesson in itself -- it makes a great substitute teacher plan as well! It gets kids to critically think about the lines of the staff to fill in the blanks... my kids love it as it's fun and challenging. Would love to hear feedback how it's working in your classrooms. Any questions, you know where to find me. Have fun!