Make unplugged coding, debugging, algorithms, loops, conditionals, binary code, and coding logic fun and easy to teach with this Code Detective Lab worksheet pack! This low-prep, print-and-go resource helps students practice coding concepts through detective-themed coding mysteries, logic clues, sequencing tasks, debugging challenges, binary decoding, and prompt thinking.

Students will work through engaging unplugged coding activities with clear directions, print-friendly layouts, and structured problem-solving tasks. Activities include identifying algorithm, loop, bug, and condition clues; ordering mystery algorithms; debugging out-of-order steps; deciding whether clues use loops; rewriting repeated commands as loops; using if/then mystery rules; sorting evidence cards; decoding binary detective codes; solving a logic grid; predicting mystery outputs; choosing stronger prompts; and completing a mixed review page.

This resource is perfect for 2nd Grade, 3rd Grade, 4th Grade, STEM lessons, computer science, coding centers, unplugged coding practice, early finishers, morning work, small groups, sub plans, homeschool, intervention groups, and computational thinking practice.

What’s Included:

• 1 colorful cover page

• 12 student worksheet pages

• 1 answer key page

• Code Clue Cards worksheet

• Mystery Algorithm Order worksheet

• Debug the Mystery Algorithm worksheet

• Loop Clue Detective worksheet

• Secret Loop Code worksheet

• If Then Mystery Rules worksheet

• Evidence Card Sort activity

• Binary Detective Code worksheet

• Logic Grid Suspect Sort worksheet

• Predict the Mystery Output worksheet

• Prompt Detective worksheet

• Code Detective Review page

Skills Practiced:

• Unplugged coding

• Algorithms

• Sequencing

• Debugging

• Loops

• Repeated commands

• If/then conditionals

• Binary code

• Logic clues

• Logic grid reasoning

• Classification

• Predicting outputs

• Prompt thinking

• Computational thinking

• Critical thinking

• Problem solving

• Sorting and categorizing

• Independent work skills

Perfect For:

• STEM centers

• Coding lessons

• Computer science units

• Unplugged coding practice

• Morning work

• Centers

• Small groups

• Early finishers

• Homework

• Sub plans

• Review

• Intervention groups

• Homeschool

• Independent practice

Why Teachers Will Love It:

• No prep and easy to use

• Print-and-go worksheet format

• No devices required

• Detective theme keeps students engaged

• Strong practice for algorithms, debugging, loops, and conditionals

• Includes binary code, logic clues, and prompt thinking

• Great for STEM centers and early finishers

• Answer key included for quick checking

Suggested Use:

Use these worksheets during STEM lessons, computer science units, coding centers, morning work, small group instruction, or unplugged coding practice. Students can complete one page at a time to build confidence with algorithms, debugging, loops, conditionals, binary code, logic clues, and computational thinking without needing a screen.

Please Note:

This is a digital download. No physical item will be shipped. An answer key is included. Some open-ended prompt or logic-based responses may vary.