From Sketch to Screen

Overview

In lesson 7 of the 12-lesson unit Crafting with Joints: Box Design, students begin translating their annotated box drawings into a digital CAD model. They are introduced to the school-approved CAD software interface and practise creating a simple rectangular form using basic tools before beginning their own design.

Learning intentions

• WALT identify the main tools and controls in the CAD workspace.
• WALT create and modify a simple digital box form.
• WALT use our annotated drawing to guide accurate digital modelling.
• WALT save and organise a CAD file so it can be developed in later lessons.

Success criteria

• I can open the correct CAD workspace and identify the view, selection, sketch and extrude tools.
• I can create a rectangle, add approximate dimensions, and turn it into a 3D form.
• I can explain how my digital model connects to my paper design.
• I can save my file using the agreed naming convention and describe one next step.

Curriculum links

• Technology — technological practice: planning for practice and developing a technological outcome.
• Technology — students use knowledge, skills and processes to develop a digital representation of a designed product.
• Digital Technologies — students use digital tools and systems to create, manage and communicate a design.
• Key competencies: thinking; managing self; participating and contributing.

Lesson structure (50 minutes)

1. 0–5 min · Hook and retrieval. Display the comparison on the introduction and hook slides: a hand-drawn box design beside a digital model, and ask, “What information must not be lost when a drawing becomes a CAD model?” Students discuss with a partner, then identify two important details from their own annotated drawings, such as dimensions, joint position or material thickness.

2. 5–12 min · Teacher demonstration. Use the CAD tools and demonstration slides while projecting the CAD software. Model how to open a new file, select the correct plane, create a rectangle, select or enter dimensions, and use the basic extrude or equivalent 3D-form tool. Demonstrate orbiting, zooming, undoing, and saving. Students watch with their hands off devices and name each tool as it is used. Emphasise that today’s model is a simple starting form, not the finished box.

3. 12–17 min · Guided tool practice. Distribute the CAD tool practice and design translation sheet. Students follow the short sequence on their computers: open a file, create a rectangle, change one dimension, produce a 3D form, and save it. Pause after each step for a visual check. Circulate to confirm students are selecting the correct plane and entering dimensions rather than freehanding every feature.

4. 17–33 min · Individual CAD build. Students open their previous box drawing and create a first digital version based on its overall length, width and height. They should include only the main form at this stage; joints, lid details and refinements will be added in later lessons. Students record on the worksheet which dimensions they used and one drawing detail they have not yet added. Keep the activity instructions and troubleshooting slides visible, including reminders to save regularly and ask a peer before requesting teacher help.

5. 33–41 min · Peer screen check. In pairs, students show their model and drawing to one another. Using the prompts on the CAD tool practice and design translation sheet, the reviewer identifies one accurate translation and asks one useful question, such as “Where will the joint be added?” or “Which dimension still needs checking?” Students make one small correction or note a specific change for the next lesson.

6. 41–47 min · Share and discuss. Invite two or three students to display their models. Use the discussion and plenary slides to compare different approaches and ask: “What was easier in CAD than on paper?” and “What could go wrong if a dimension is entered incorrectly?” Students contribute examples of accuracy, scale, views or file management.

7. 47–50 min · Exit check and pack-up. Students complete the final three prompts on the CAD tool practice and design translation sheet: name one CAD tool, state one feature translated from the drawing, and identify one next step. Students save to the correct class folder, close the software, and leave devices ready for the next class.

Resources

• Teacher computer and projector
• the introduction and hook slides, used throughout the lesson
• School-approved CAD software and student logins
• One computer per student, or one per pair if devices are limited
• Students’ annotated box drawings from the previous lesson
• the CAD tool practice and design translation sheet
• Shared class folder or learning management system
• Headphones where required for accessibility or concentration
• Whiteboard and pens

Assessment

• During the demonstration and guided practice, check whether students can identify the plane, rectangle, dimension, extrude and navigation tools.
• During independent work, review whether the digital form reflects the drawing’s key dimensions and whether students save using the agreed file name.
• Use the worksheet exit responses to identify students needing a short re-teach of navigation, dimensioning or file management before joints are introduced.

Differentiation

• Provide a printed or enlarged step sequence from the CAD tool practice and design translation sheet, and seat students who need support near the demonstration screen or a confident peer.
• Pair students strategically for the screen check; allow students to use a mouse rather than a trackpad and provide additional time for navigation or typing dimensions.
• For EAL learners, use the labelled tool icons on the CAD tools and demonstration slides and sentence starters: “My model shows…”, “I still need to…”, and “The dimension I checked was…”.
• Support students with fine-motor, visual or processing needs through zoom controls, keyboard shortcuts, repeated demonstrations and teacher-provided checkpoints. Extension students may add a construction line or an accurately dimensioned secondary feature, provided the main form is saved first.