Emergency Sub Day Mystery for Grades 2-5: The Case of the Locked Planning Binder | Printable One-Period Sub Tub Activity

The regular teacher left a playful challenge for the class: the afternoon schedule is tucked inside the planning binder, but a friendly code lock is keeping it shut. Your students become Schedule Detectives. Each team solves 6 short puzzles. Every puzzle gives a clue word, and the first letters of the clue words spell where the binder key card is waiting. Happy ending — nobody is in trouble, and the sub finds the schedule in time for recess/lunch/specials as written.

Built for a class of 20-30 students in 4-6 teams of 3-5, one 35-45 minute period. Packet mode only (no station rotation required) so a substitute can run it cold from a sub tub.

What students practice (honest; not formally aligned to any state or Common Core standard):

- Following multi-step directions (letter code)

- Spelling and word recognition (word search, scramble)

- Spatial reasoning (maze)

- Simple logic / ordering

- Addition and subtraction word problems

- Teamwork and taking turns

You get (16 pages):

- 1-page leave-in-the-tub sub script (read-aloud + timeline)

- Short teacher/sub guide (grouping, roles, materials, tips)

- Class roster blank + Team Record Sheet

- 6 student puzzles: The Locked Note, Schedule Word Search, Hallway Maze, Who Has the Key Card?, Clock & Count Math, Binder Word Scramble

- Case Closed ending + Master Schedule Detective certificate

- Early-finisher page (bonus cipher + doodle frame)

- Hint cards (2 per puzzle) and a 2-page answer key

- Terms of use (one-classroom license)

Good for emergency sub plans, Fun Friday, early finishers, team-building, and indoor recess. Grades 2-5. Grade 2 teams may need the bigger hints. Black-and-white printing works.

This is a digital download, so nothing will be shipped. License: one teacher's classroom. Other teachers need their own copy. Please don't upload the file to shared drives or school-wide servers. All story, puzzles, and artwork are original to Party Puzzle Kits (no licensed characters, no clip art, no AI-generated images), and every puzzle answer was checked by a script before release.