Free Printable WorksheetScienceGrade 3Science CurriculumSCI.3.66

3.66 Iterate to Improve a Design Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 3 Science worksheet provides structured practice on 3.66 Iterate to Improve a Design. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Iterate to Improve a Design - Which change is best supported by the test data to improve and retest; explain how iteration improved performance. (NGSS 3–5-ETS1-3; CCC: Optimization)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 3

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 3.66 Iterate to Improve a Design skill assessments:

Problem 1Difficulty: Mastery

A model greenhouse warmed 3°C with no seal. After sealing the edges, it warmed 5°C. After adding many vent holes, it warmed only 2°C.

What does the test data show about the design changes?

ASealing edges helped, but adding many vent holes made warming worse.

BThe greenhouse warmed the same because 3 equals 5.

CVent holes helped the most because 2 is bigger than 5.

DNeither change mattered because the numbers are all close.

Solution & Explanation:Temperature increase improved from 3°C to 5°C when sealed. Adding many vents dropped it to 2°C, so vents reduced the warming.

Problem 2Difficulty: Mastery

A balloon rocket traveled 8.0 m. After smoothing the string guides, it traveled 9.2 m. After also adding extra tape to the rocket body, it traveled 8.7 m.

Which iteration step should the team keep for the next design to improve and retest?

ARemove the smoother guides and keep the extra tape.

BChange the starting point each time instead of changing the design.

CKeep the smoother string guides and remove the extra tape.

DKeep adding more tape because it must help.

Solution & Explanation:Smoother guides increased distance (8.0 to 9.2). Adding tape lowered distance (9.2 to 8.7), so keep the helpful change and drop the harmful one.

Problem 3Difficulty: Mastery

A bridge held 15 washers at first. After adding triangle braces, it held 22 washers. After also adding a center pillar, it held 21 washers.

Which conclusion is best supported by the data about improving the bridge?

AThe bridge got worse after braces because 22 is less than 15.

BThe center pillar was the only change that helped.

CBoth changes always improve the bridge by the same amount.

DTriangle braces improved the bridge; adding the pillar did not improve it further.

Solution & Explanation:Performance increased from 15 to 22 with braces, but then dropped slightly to 21 after adding the pillar, so braces helped and the pillar did not add improvement.

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Frequently Asked Questions

Common questions about printing, using, and solving this worksheet

QHow do I download and print this 3.66 Iterate to Improve a Design worksheet?

Click either the "Download PDF" or "Download DOCX" button at the top of the page. You can print the PDF directly from your browser or edit the DOCX file in Microsoft Word or Google Docs to tailor the questions to your students.

QIs this 3.66 Iterate to Improve a Design worksheet free for teachers and homeschoolers?

Yes! All learning materials, worksheets, and practice resources on Free K12 Practice are 100% free for teachers, students, parents, tutors, and homeschooling families for non-commercial educational use. No account or subscription is required.

QCan students practice 3.66 Iterate to Improve a Design online with instant feedback?

Yes! In addition to this printable worksheet, students can practice 3.66 Iterate to Improve a Design interactively on our platform with automated grading, instant score tracking, and detailed step-by-step solutions.

QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 3 Science students. It aligns with educational standard SCI.3.66 (Grade 3 science skill focused on Iterate to Improve a Design.).