Computing · Year 1

Active learning ideas

Robot Challenges and Debugging

Active learning works because Year 1 students develop computational thinking best when they physically program a robot, observe its literal response, and immediately adjust their commands. The hands-on cycle of planning, testing, and fixing builds confidence in debugging while connecting abstract ideas to concrete results.

• National Curriculum Attainment Targets
• KS1: Computing - Programming
• KS1: Computing - Debugging

• 20–40 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Mystery Object
• 25 min · Pairs

Pair Debug: Maze Fix-Up

Pairs build a 4x4 grid maze with tape on the floor. One student programs the Bee-Bot to navigate it, while the partner observes and notes errors. They swap, debug by testing one instruction at a time, and record fixes on clipboards.

What can you do to help your friend when their robot is not going the right way?

Facilitation Tip

During Pair Debug, sit nearby pairs and listen for students to name the exact instruction that caused the wrong turn before making corrections.

What to look for

Observe students as they program their robot. Ask: 'What is the robot supposed to do next?' and 'What instruction will you give it to make that happen?' Note which students can articulate the next step in their algorithm.

• Understand
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Activity 02

• Mystery Object
• 35 min · Small Groups

Team Relay: Puzzle Paths

In small groups, students line up beside a complex maze. Each adds one forward, turn, or pause instruction to the robot. If it veers off, the group pauses to debug together before the next player. Repeat with varied mazes.

Why is it a good idea to check each instruction one at a time?

Facilitation Tip

Before Team Relay, model how to check each instruction one by one using a visual checklist taped to the table.

What to look for

Provide students with a simple maze diagram and a pre-written, incorrect instruction sequence. Ask them to circle the instruction that causes the robot to go the wrong way and write the correct instruction.

• Understand
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Activity 03

• Mystery Object
• 40 min · Whole Class

Class Challenge: Real-Life Routes

As a whole class, brainstorm robot tasks like delivering post. Divide floor into zones, program robots to follow routes, and debug live. Vote on best fixes and share why they worked.

Can you think of something a robot could help people do in real life?

Facilitation Tip

For Class Challenge, provide real-life route cards with red stickers to mark the robot’s actual path so students see the difference between plan and outcome.

What to look for

After a team completes a maze, ask: 'What was the hardest part of getting your robot to the end?' and 'How did you help each other when the robot made a mistake?' Listen for evidence of collaborative problem-solving and debugging strategies.

• Understand
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Activity 04

• Mystery Object
• 20 min · Individual

Solo Predict: Instruction Test

Individually, students draw a maze and write five instructions. Test on a robot, debug solo first, then pair with a friend for a second check. Log before-and-after sequences.

What can you do to help your friend when their robot is not going the right way?

Facilitation Tip

In Solo Predict, have students draw arrows on printed mazes to show the robot’s expected movement before running the program.

What to look for

Observe students as they program their robot. Ask: 'What is the robot supposed to do next?' and 'What instruction will you give it to make that happen?' Note which students can articulate the next step in their algorithm.

• Understand
• Analyze
• Evaluate
• Self-Management
• Social Awareness

A few notes on teaching this unit

Teach debugging as a systematic process by modeling think-alouds where you intentionally make a mistake and fix it one step at a time. Avoid telling students the answer; instead, ask them to predict what will happen next and explain why. Research shows young learners benefit from visual scaffolds like arrow cards or colored tiles to represent instructions before typing them into the robot.

Successful learning looks like students programming robots with clear, step-by-step instructions that match their intended path, recognizing errors, and revising commands without restarting the whole sequence. Teams should articulate their debugging steps and explain how they helped each other improve the program.

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Watch Out for These Misconceptions

• During Pair Debug, watch for students who assume the robot ‘meant’ to go a certain way and change instructions based on guesses rather than observing the exact wrong turn.

  Pause the activity and have the pair physically act out the robot’s movement, saying each instruction aloud as they move. Use a small toy robot to replay the incorrect path, pointing out where the robot deviated from the plan so students can identify the specific misstep.

• During Team Relay, students may delete the entire instruction sequence when the robot fails, thinking this is debugging.

  Hand each team a small dry-erase board to write the instructions as they go. When the robot fails, ask them to cross out only the faulty instruction and rewrite it, reinforcing that fixes happen step-by-step.

• During Class Challenge, students believe there is only one correct route through the maze.

  Provide multiple printed route cards for the same maze and ask teams to compare paths. During the debrief, highlight how different logical sequences can both reach the goal, emphasizing efficiency as a secondary goal.

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Methods used in this brief

• Mystery Object