Improving and Redesigning

Active learning helps students see that testing isn’t about success or failure but about gathering data to guide decisions. When students work with real materials and observe immediate outcomes, they develop the habit of using evidence to refine designs. This approach builds persistence and a growth mindset, both critical for young engineers.

• 1st Grade
• Science
• 4 activities
• 20 min–45 min

Learning Objectives

1. Analyze test results to identify specific weaknesses in a designed solution.
2. Revise a design by making targeted changes based on performance data.
3. Justify design modifications by explaining how they address identified problems.
4. Explain the iterative nature of the engineering design process, including multiple cycles of testing and redesign.

Inquiry Circle

⏱ 35 min·Pairs

Inquiry Circle: Targeted Fix Lab

After a prior testing session, each pair identifies the single weakest point in their design from their recorded data. They make exactly one change to address it, document the change with a sketch, retest using the same procedure, and compare the before-and-after results. Pairs share whether their targeted fix worked and what they learned.

Prepare & details

Construct a revised design based on testing feedback.

Facilitation Tip: During the Collaborative Investigation, circulate and ask students to point to the exact part of their design that failed and explain why they think it happened based on their test results.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Think-Pair-Share

⏱ 20 min·Pairs

Think-Pair-Share: What Changed and Why?

Show a 'before' sketch and an 'after' sketch of the same student design that was revised between two tests. Students identify what changed between the two versions, predict whether the change would help or hurt performance based on what they know, then pair to compare predictions before the teacher reveals the actual test results.

Prepare & details

Justify changes made to a design based on its performance.

Facilitation Tip: In the Think-Pair-Share, provide sentence stems like 'The data shows that...' or 'I changed this part because...' to guide students in using evidence in their discussions.

Setup: Standard classroom seating; students turn to a neighbor

Materials: Discussion prompt (projected or printed), Optional: recording sheet for pairs

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Gallery Walk

⏱ 25 min·Individual

Gallery Walk: Redesign Stories

Post paired display boards around the room showing a design's first test result alongside the revised design and its second test result. Students walk the gallery and for each display write what changed, why they think it changed, and one more change they might try. The class discusses patterns in successful redesigns.

Prepare & details

Explain why engineers often go through multiple cycles of design and testing.

Facilitation Tip: For the Gallery Walk, place a sticky note on each design with a question starter like 'What part of this redesign helped the most?' to focus student observations.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Simulation Game

⏱ 45 min·Small Groups

Simulation Game: The Revision Round

The teacher sets up a design challenge such as building a cup holder from a single sheet of paper, lets students build and test a first version, then stops the class for a structured group analysis. Students share what went wrong at each table, the teacher collects observations on the board, and students redesign using the collective data before testing a second time.

Prepare & details

Construct a revised design based on testing feedback.

Setup: Flexible space for group stations

Materials: Role cards with goals/resources, Game currency or tokens, Round tracker

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Teaching This Topic

Teachers should model the language of revision by thinking aloud as they analyze test results. Use a think-aloud to show how to separate what worked from what didn’t, and avoid praising effort alone without connecting it to data. Research shows that young students benefit from visual scaffolds, like circling or highlighting specific parts of their designs that need changes. Avoid rushing students through the process; the goal is for them to internalize the habit of using evidence to guide their decisions.

What to Expect

Students will analyze test results to identify specific parts of their designs that need improvement. They will explain their revisions using data rather than assumptions, and they will engage in multiple cycles of testing and improvement with confidence. Clear communication about changes and reasons will show their understanding of the redesign process.

Watch Out for These Misconceptions

Common Misconception

During the Collaborative Investigation, watch for students who want to start over when a design fails. Bring them back to their test data and ask, 'Which part of your design stayed strong? How can you keep that part while fixing the weak spot?'

What to Teach Instead

During the Think-Pair-Share, if students suggest 'more materials' as a fix, hold up a test result showing how weight affected their design. Ask, 'How did the extra materials change how your design worked? What else could we try?'

Common Misconception

During the Gallery Walk, watch for students who assume all redesigns are equal. Point to a specific design and ask, 'What does this data tell you about why this change worked better?'

What to Teach Instead

During the Revision Round, if students treat the second test as final, remind them that engineers often test many times. Have them brainstorm, 'What new question does this test result raise for your design?'

Assessment Ideas

Quick Check

After the Collaborative Investigation, show students a drawing of a failed design (e.g., a tower with a circled weak spot). Ask them to write or draw one targeted fix using evidence from their test results.

Exit Ticket

After the Think-Pair-Share, provide students with a simple data sheet from a test (e.g., 'Bridge held 2 pennies before breaking'). Ask them to write one sentence explaining what the data tells them and one change they would make next time.

Peer Assessment

During the Gallery Walk, have students share their redesigned solution with a partner. Ask partners to point to one change their classmate made and explain whether it was supported by the test data.

Extensions & Scaffolding

• Challenge: Provide a set of new constraints (e.g., only use paper clips this time) and ask students to create a third iteration of their design that meets both the original and new requirements.
• Scaffolding: Give students a sentence frame like 'The test showed that ____, so I will change ____ to ____' to structure their explanations during the Think-Pair-Share.
• Deeper: Introduce a class chart where students track the number of iterations for each design and discuss patterns they notice across different groups.

Key Vocabulary

Test Data	Information gathered from testing a design, showing how well it performed and where it had problems.
Redesign	To change or improve a design based on what was learned during testing.
Revision	A specific change made to a design to make it work better.
Performance	How well a design works or functions when it is tested.