Help your Computer Science students master the foundations of debugging with this classroom-ready Java worksheet packet! Designed for Grades 9–12 and aligned with AP CSA + CSTA standards, Lesson 1.7 introduces students to the three major types of errors—compiler, runtime, and logic errors—and teaches practical strategies for finding and fixing bugs using print debugging and code tracing.

This engaging, printable worksheet includes a clear mini-lesson, vocabulary practice, guided questions, code tracing, and a hands-on debugging activity using JDoodle.com (free online Java compiler). Students will analyze buggy code, predict outputs, identify error types, and repair broken programs step-by-step.

A complete Teacher Guide with answer keys, teaching script, timing suggestions, misconceptions, and full solution code is included to make instruction effortless.

Perfect for CSA Java, Intro to CS, or any high school programming class!

✅ What’s IncludedStudent Worksheet (Printable 8.5x11)

• Title page with cute debugging icon
  
• Mini-lesson explaining:
  
  • Compiler errors
    
  • Runtime errors
    
  • Logic errors
    
  • Print debugging techniques
    

• Quick reference box (Java debugging tools)
  
• Vocabulary + Fill-in-the-blanks (8 terms)
  
• Guided practice:
  
  • Identify-the-error questions
    
  • Code tracing
    
  • Predict output
    
  • Fix-the-code exercise
    

• Coding Activity on JDoodle
  
  • Buggy starter code
    
  • Students fix compiler, runtime & logic errors
    
  • 3 test cases to run
    
  • Level-Up challenge
    

• Reflection questions / Exit ticket
  

Teacher Guide

• Lesson overview & objectives
  
• Standards alignment (AP CSA + CSTA)
  
• Materials & prep steps
  
• Teaching script and pacing guide
  
• Common misconceptions & tips
  
• Full answer key
  
• Completed Java solution code
  
• Differentiation strategies
  
• Optional homework & extra practice questions
  

🎯 Skills Covered

• Reading Java error messages
  
• Identifying error types
  
• Using print debugging effectively
  
• Fixing invalid syntax
  
• Resolving runtime crashes
  
• Correcting incorrect logic
  
• Testing and validating code
  

💻 Technology

• Works with JDoodle.com (no downloads required)
  
• Perfect for Chromebook classrooms
  

🎒 Great For

• AP Computer Science A
  
• CSA Java Units 1–2
  
• High school computer science classes
  
• Sub plans
  
• Practice before big debugging lessons
  
• Students who struggle with fixing errors