Space Cadet

Students learn coding concepts as they solve these puzzles to help their astronaut through the space journey. Request Quote

Course Summary
  • Grades 1 - 2
  • Beginner level
  • 8 lessons
  • Tynker Blocks
    • Web iPad
Course Includes
  • 8 lessons
  • 48 activities
  • Enhanced Creativity Tools
  • Automatic Assessment
  • Tutorials and Reviews
  • Coding Puzzles
  • DIY Projects
  • Quizzes
  • Answer Keys
No previous coding experience required.

Lesson Plan

Course: Space Cadet
Lesson 5: Glitchy Code
Number of Levels: 6
Time: 30+ mins


The puzzles in this lesson introduces students to debugging, which is the process of finding and fixing programming errors. In each puzzle, students are given a puzzle and a piece of code that has a bug in it. Students will need to fix the bug so the character can do what they are supposed to.

New Code Blocks

  • None


  • Debugging: The process of finding and fixing programming errors
  • Bug: An error in a piece of code


Students will...
  • Apply coding concepts to troubleshoot and debug programs


  • iPads (with installed Tynker app), computers, or laptops

Warm-Up (5 minutes)

Pair up students and ask them to discuss the following:
  • If your code doesn't work, what can you do to fix it? (Answers: Remove all code blocks and start over, break down your code, think out loud through your steps, ask the teacher/a friend for help)
  • Have you ever gotten stuck on a coding puzzle and felt frustrated? What are some strategies you used to lower your level of frustration?

Activities (30 minutes)

Facilitate as students complete all Glitchy Code modules:
Glitchy Code
  • Inform students that this lesson has 6 levels that they need to complete.
  • Tell students that the puzzles have already been solved, but the solutions are glitchy! They will need to analyze the provided code and fix the bug.
  • Are students struggling? Here are different debugging strategies your students can try:
    • Run the buggy code to see what happens. Next, modify the code.
    • Read through the buggy code and use a finger to trace what should be happening to the character as each code block is executed. Also encourage students to say the steps out loud.
    • Ignore the buggy code and write out what their character needs to do. Then compare that code to the buggy code.
    • Make sure students understand how to change the parameter of the "repeat" block: Tap the value (e.g., 5). Next, select a different value (e.g., 7).
  • Debugging Answer Key:
    • Level 1: Increase the value in the "repeat" block from 5 to 7.
    • Level 2: Decrease the value in the "repeat" block from 4 to 3. Add a "walk" block after the "repeat" block.
    • Level 3: Increase the value in the "repeat" block from 2 to 3. Switch the order of the "jump" and the "walk" blocks inside the "repeat" block by dragging the "walk" block up.
    • Level 4: Increase the value in the "repeat" block from 2 to 3. Add a "walk" block before and after the "repeat" block.
    • Level 5: Add a second "repeat" block with a value of 3 and containing a "walk" block.
    • Level 6: Increase the value in the "repeat" block from 2 to 3. Next, add a second "repeat" block with a value of 3 and containing a "walk" block.

Extended Activities (10 minutes)

Ask your students…
  • What does it mean to "debug" your code? (Answer: Find and fix programming errors)
  • What is a "bug"? (Answer: An error in code)
  • Why is it important to learn how to debug a program?

U.S. Standards

  • CCSS-Math: K.CC.B.4, K.CC.B.5, 1.OA.B.3, 2.OA.B.2, MP.1
  • CCSS-ELA: RF.K.4, RF.1.4, RF.2.4, RF.1.4.A, RF.2.4.A, 1.RI.10, 2.RI.10
  • CSTA: 1A-AP-09, 1A-AP-10, 1A-AP-11, 1A-AP-14
  • CS CA: K-2.AP.12, K-2.AP.13, K-2.AP.16
  • ISTE: 1.c, 1.d, 4.d, 5.c, 5.d, 6.b

U.K. Standards

Key Stage 1
  • Use logical reasoning to predict the behaviour of simple programs
  • Use technology safely and respectfully, keeping personal information private; identify where to go for help and support when they have concerns about content or contact on the internet or other online technologies
Key Stage 2
  • Design, write and debug programs that accomplish specific goals, including controlling or simulating physical systems; solve problems by decomposing them into smaller parts.
  • Use logical reasoning to explain how some simple algorithms work and to detect and correct errors in algorithms and programs.
  • Understand computer networks, including the internet; how they can provide multiple services, such as the World Wide Web, and the opportunities they offer for communication and collaboration.
  • Use technology safely, respectfully and responsibly; recognise acceptable/unacceptable behaviour; identify a range of ways to report concerns about content and contact.