Frame building workshop

Overview

This lesson begins the construction phase of the Sustainable Esky Design Unit. Students will build the wooden frame using lap joints, focusing on selecting and using appropriate tools and equipment safely, and evaluating how joint properties affect strength and fit.

Learning intentions

Students will:

• investigate and select suitable materials, systems and tools to build the esky frame
• construct lap joints accurately and assemble a rigid frame
• analyse how material and tool choices affect joint strength, alignment and durability
• use sustainability and safety considerations to guide build decisions

Success criteria

Students can:

• produce lap joints that fit tightly with consistent measurements and clean surfaces
• assemble the frame so corners are square and the structure holds its shape
• justify key tool/material choices using design brief requirements and sustainability/safety considerations
• complete a short evaluation of what went well and what they will adjust next lesson

Curriculum links

• Analyse needs/opportunities; develop design briefs; investigate and select materials, systems, components, tools and equipment to create designed solutions - Analyse and make judgements on how characteristics and properties of materials, systems, components, tools and equipment can be combined to create designed solutions - Develop design criteria independently including sustainability to evaluate design ideas, processes and solutions - Develop project plans for intended purposes and audiences, managing time, cost, risk, processes and production ## Lesson structure (60 minutes)

1. 0–5 min · Starter (safety + goals). Teacher reviews workshop rules (PPE, tool handling, clamping, safe bench habits) and displays the build target for today: “Frame with lap joints assembled and square.” Students repeat key safety checks and confirm their personal PPE.

2. 5–12 min · Mini teach (lap joints in timber). Teacher models one lap joint: measuring, marking, cutting depth, chisel/plane finishing, and how correct fit improves strength and alignment. Students observe, then record a “quality checklist” for fit, depth, squareness and finish.

3. 12–30 min · Set-up + measure (construction preparation). Teacher allocates timber pieces and demonstrates how to mark datum lines and identify which edges form the lap shoulders; checks clamps and correct tool use. Students measure and mark their pieces using the unit’s timber dimensions from earlier lessons, then do a dry run by placing joints without glue.

4. 30–45 min · Cut/shape lap joints (hands-on). Teacher circulates to coach on cutting sequence, preventing tear-out, and maintaining consistent depth and shoulder thickness. Students cut and pare joints to improve fit, using chisels/planing as available, and stop for teacher checks when tolerances are uncertain.

5. 45–53 min · Assemble frame (fit + square). Teacher demonstrates dry assembly, then final alignment using a square and clamps before any fastening/gluing step required by the unit sequence. Students assemble their lap joints, check corner squareness, and adjust (light sanding/pare) until the frame sits correctly.

6. 53–58 min · Process evaluation (quick critique). Teacher leads a short peer assessment using the quality checklist and design criteria, focusing on joint fit and alignment outcomes. Students complete a brief “success/adjust” note for their frame: what meets criteria and what they’ll fix next time.

7. 58–60 min · Exit ticket (evidence of learning). Teacher collects one exit ticket per student (or per pair) with two sentences: one justification of a tool/material choice and one improvement target for next lesson. Students submit and pack away safely.

Resources

• timber offcuts/specified frame boards for student builds
• marking tools: ruler/measuring tape, square, pencil, marking gauge (if available)
• cutting tools appropriate to school practice (e.g., saws) and shaping tools (e.g., chisels/hand planes) for lap refinement
• clamps and scrap blocks for safe workholding
• PPE: safety glasses/eye protection, hearing protection, appropriate footwear
• workshop safety signage and tool instructions
• adhesive/fasteners only if they are used in the unit sequence for Lesson 7 (otherwise reserve for next step)
• quality checklist printout (fit, depth, shoulder contact, squareness, finish)
• exit ticket slips and pen/pencils

Assessment

• Formative: teacher observations during measuring, joint cutting and assembly (fit, tool safety, correct use of clamps/squares)
• Formative: peer check against the quality checklist during the dry run and final square check
• Summative-in-lesson: exit ticket (tool/material justification + one actionable improvement)

Differentiation

• Support: provide sentence starters for the justification (“I chose ___ because…”; “The joint strength depends on…”), and offer a “measuring step” worksheet with key marks to copy
• Support: pre-check critical dimensions during the 12–30 minute stage to reduce rework and time loss
• Extension: challenge advanced groups to test tolerance by swapping one joint orientation (if safe/allowed) or to improve surface finish to reduce gaps and increase durability
• SEN/EAL: assign clear roles within pairs (measurer/marker, cutter/shaper, safety checker) and use visual checklists; allow additional time for measuring without reducing required safety checks