Science · 1st Grade · Engineering and Design Solutions · Weeks 10-18

Developing Models and Sketches

Students use sketches and physical models to represent their proposed solutions to a problem.

• Common Core State Standards
• K-2-ETS1-2

About This Topic

A key step in the engineering design process is translating an idea from a designer's mind into a form that others can understand and that can be built and tested. Standard K-2-ETS1-2 asks students to develop a simple sketch, drawing, or physical model of their solution to show how its shape helps it function as needed. For first graders, this means learning that a sketch is not just a drawing but a communication tool that carries specific information about how a design works.

Students often jump directly from a problem to building without planning. This topic slows that process down intentionally. A quick sketch or rough model forces a student to make specific decisions about shape, size, and materials before committing to a build. It also creates a document that can be compared to the finished product to see whether the plan was followed and where it changed during construction.

Active learning works especially well here because students can compare each other's models of the same solution and immediately see that different representations highlight different aspects of a design. Discussing what information each sketch communicates and what it leaves out builds students' ability to both create and read technical representations, a skill they will use across all future science and engineering work.

Key Questions

1. Design a sketch or model that clearly communicates a solution idea.
2. Explain the purpose of creating a model before building a final product.
3. Compare how different materials can be used to create a model.

Learning Objectives

• Design a simple sketch or physical model to represent a proposed solution to an engineering problem.
• Explain the purpose of creating a model before building a final product.
• Compare how different materials can be used to create a model of the same solution.
• Identify the key features of a sketch or model that communicate how a solution works.

Before You Start

Identifying Problems

Why: Students need to be able to recognize and define a problem before they can design a solution for it.

Basic Drawing Skills

Why: Students should have foundational skills in making simple marks and shapes to begin creating sketches.

Key Vocabulary

Sketch	A quick drawing that shows the main parts of an idea or object. It helps communicate what something will look like and how it works.
Model	A representation of an object or idea, often made from different materials. It can be a drawing, a small version, or a physical object that shows how something is built or functions.
Solution	An answer to a problem. In engineering, it is the design or invention created to fix or improve something.
Function	The job or purpose that something is designed to do. For example, the function of a chair is to be sat on.
Materials	The substances or things used to make something. For models, this could include paper, clay, blocks, or cardboard.

Watch Out for These Misconceptions

Common Misconception

A model has to look like the final product to be useful.

What to Teach Instead

Students sometimes refuse to start a model unless they can make it look 'right.' Active partner work, where a rough sketch still successfully communicates enough information for a partner to build something functional, demonstrates directly that function matters more than appearance at the planning stage.

Common Misconception

Sketches are only for artists, not scientists or engineers.

What to Teach Instead

Many students see drawing as an art activity rather than a science tool. Showing real engineering notebooks, even simplified versions, from NASA or product designers reveals that rough, functional sketches are standard professional practice. The goal of an engineering sketch is to record and communicate an idea, not to be beautiful.

Common Misconception

Building a model before testing means the design process is finished.

What to Teach Instead

Students often treat the model as the finished product. Emphasizing that every model is a prototype, meaning a testable draft rather than a final version, helps students see building as a step in the middle of the process, not the end. This prepares them for the testing and revision steps that follow.

Active Learning Ideas

Think-Pair-Share: What Does a Sketch Tell Us?

Show two different student-drawn sketches of the same simple bridge design, one very detailed and one very rough. Students identify what information each sketch gives and what questions it leaves unanswered. They pair to discuss which sketch would be more helpful to someone trying to build the bridge, then share criteria for what makes a useful engineering sketch.

20 min·Pairs

Inquiry Circle: Model the Message

Each student sketches a simple design for a container that holds five small blocks. Students swap sketches with a partner, who uses only the sketch to build a model from craft materials. Partners then compare the built model to the original sketch and identify where the sketch communicated clearly and where it caused confusion.

35 min·Pairs

Gallery Walk: Sketch Critique

Post several student or teacher-prepared engineering sketches around the room showing different levels of detail and clarity. Students visit each sketch and leave a sticky note identifying one thing the sketch makes clear and one question the sketch leaves unanswered, then the class debriefs by discussing what all the 'clear' notes have in common.

25 min·Individual

Stations Rotation: Model Materials Comparison

Set up three stations with the same design challenge but different available materials: clay, interlocking blocks, and craft sticks with glue. Students build the same simple design at each station, then compare how the material choice affected the ease and accuracy of modeling, recording which material best represented their design and why.

40 min·Small Groups

Real-World Connections

• Architects create detailed blueprints and 3D models of buildings before construction begins. These visual plans show clients and construction crews exactly how the building will look and function, helping to avoid mistakes and ensure the design meets needs.
• Toy designers create prototypes, which are early models of toys, using materials like clay or 3D printing. This allows them to test the toy's shape, size, and playability before mass production.

Assessment Ideas

Quick Check

Present students with a simple problem, such as 'Design a way to keep a cookie from breaking when dropped from a low height.' Ask them to draw a sketch of their solution and label one part that helps it work. Review sketches to see if students can represent a functional idea.

Discussion Prompt

Show students two different physical models of the same simple object (e.g., a bridge made of popsicle sticks vs. one made of LEGOs). Ask: 'What does each model show us well about the bridge? What information might be missing from each model?' Guide them to discuss how different materials highlight different aspects of a design.

Exit Ticket

Provide students with a sketch of a simple tool (e.g., a watering can). Ask them to write two sentences explaining: 1. What is this tool for (its function)? 2. What is one part of the sketch that helps you understand how it works?

Frequently Asked Questions

Why do engineers create models before building the real thing?

Models let engineers test ideas on a small scale, catch problems early, and make changes cheaply. Building a full-size structure with expensive materials and then discovering a flaw wastes time and resources. A sketch or small physical model surfaces those issues at a stage when changing them costs very little and teaches as much as the final build.

What should a good engineering sketch include?

A useful engineering sketch shows the overall shape of the design, labels the main parts, and gives some indication of materials to be used. It does not need to be drawn to scale or look realistic, but it should clearly communicate enough information that someone else could attempt to build from it without needing a lengthy verbal explanation from the designer.

How can active learning help students develop modeling skills?

When a student builds from a partner's sketch and then gives feedback about what was clear and what was confusing, both students learn something specific. The sketch-maker learns which details their design actually needs to communicate. The builder learns to read design documents critically. This reciprocal, hands-on exchange builds skills that no amount of direct instruction about 'what a good sketch includes' can match.

How is a scientific model different from a toy model?

A scientific model is built to test a specific idea or to communicate how something works, not for play. The goal is accuracy of function: does this model behave the way the real design would? A toy replica might look detailed but not behave like the real object. In science and engineering, what a model does matters more than what it looks like.

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