Chocolate Snack Challenge

Overview

Students design and prototype a snack made from three distinct components, with only one component containing chocolate. They explore material properties through food experimentation, gather peer feedback, and refine a purposeful concept for a real end user. The lesson develops iterative design, decision-making, collaboration and responsible use of materials within the refreshed New Zealand Curriculum.

Learning intentions

• WALT explore how different food materials behave when combined, heated, cooled, shaped or layered.
• WALT develop a creative snack concept using three components and one chocolate element.
• WALT use stakeholder feedback to improve a design for a specific person or group.
• WALT make responsible decisions about ingredients, waste, safety and the needs of the end user.

Success criteria

• I can clearly describe my snack’s purpose, end user and three components.
• I can explain at least two relevant properties of my chosen materials, such as texture, strength, flavour, moisture or temperature response.
• I can test an idea, record what happened and use feedback to make a specific improvement.
• I can justify why my final combination is appealing, safe and fit for purpose.

Curriculum links

• Experiment with different materials to develop a purposeful Materials and Processing Technology outcome.
• Develop and refine an outcome in an authentic context using a brief, measurable specifications and stakeholder feedback.
• Demonstrate understanding of techniques selected for a feasible outcome through trialling and informed technique selection.
• Apply sustainable practices, including kaitiakitanga, economical use of ingredients and appropriate disposal of food waste.

Lesson structure (80 minutes)

1. 0–8 min · Hook and challenge. Teacher opens with the provocative snack challenge slides and presents the brief: design a snack with exactly three components, only one of which is chocolate, for a chosen end user. Students inspect example combinations, discuss what makes a snack fit for purpose, and identify possible users such as younger students, athletes, whānau or people with dietary needs.

2. 8–18 min · Brief and success criteria. Teacher models how to turn an idea into a brief with precise specifications, using the three-component rule, intended user, serving context, appearance, texture, taste and safety as examples; distribute the chocolate snack design worksheet. Students choose an end user, write a one-sentence brief, and set at least four measurable specifications.

3. 18–30 min · Material exploration and technique planning. Teacher introduces useful food-material properties and techniques through the material properties and technique slides: melting, chilling, binding, layering, shaping, crushing, mixing and coating. Students examine the available ingredients, predict how combinations will behave, and sketch two possible concepts, labelling the three components, tools, sequence and likely risks. Students must identify which single component contains chocolate.

4. 30–45 min · Prototype testing. Teacher demonstrates hygienic handling, safe use of equipment, allergy procedures and small-batch testing, then sets up ingredient stations. Students work in groups of three or four to make a small prototype or test samples of one key combination, recording quantities, technique, time, texture and result on the worksheet. Each group manages ingredients carefully and separates or disposes of waste responsibly.

5. 45–57 min · Stakeholder feedback. Teacher pauses practical work and explains that feedback must come from more than one first-hand stakeholder; classmates act as prospective users. Students present their prototype or concept to two peers using the feedback protocol slides. Reviewers comment on appeal, usability, taste or texture expectations, clarity of the three components, and one possible improvement. Designers record the feedback rather than defending the idea.

6. 57–72 min · Refine and communicate. Teacher prompts students to compare their original specifications with test evidence and feedback, conferencing with groups that need help selecting a realistic improvement. Students revise their design, update the ingredient list and method, and complete the evaluation section of the worksheet, explaining how at least two material properties influenced their decisions. Where possible, they make a refined sample or produce a labelled final concept drawing.

7. 72–80 min · Share and exit reflection. Teacher facilitates a quick gallery walk using the plenary and reflection slides and asks students to identify one strong material decision and one sustainable choice they noticed. Students complete the final worksheet reflection: “My most important test result was…”, “Feedback changed…”, and “My next improvement would be…”. Invite two or three groups to share concise design justifications.

Resources

• the provocative snack challenge slides
• the chocolate snack design worksheet
• Ingredient samples, including chocolate and non-chocolate alternatives
• Bowls, spoons, measuring tools, trays, knives or cutters as appropriate
• Aprons, gloves if required, handwashing and surface-cleaning supplies
• Food labels, allergen information and rubbish/compost containers
• Digital timer, camera or device for documenting prototypes
• Designated tasting equipment and clearly labelled allergy-safe areas

Assessment

• During planning, check that every concept has exactly three components, one chocolate element, a named end user and measurable specifications.
• During testing and feedback, question students about material properties, technique choices, evidence from trials and how stakeholder comments affect refinement.
• Collect the worksheet as formative evidence. Look for recorded experimentation, justified material choices, feedback from two peers, refinement decisions and consideration of kaitiakitanga.

Differentiation

• Provide a visual step sequence, ingredient icons, a completed example and sentence starters: “I chose ___ because…”, “The test showed…”, and “Feedback suggested…”.
• Offer dyslexia-friendly access: clear sans-serif font, larger text, strong contrast, short instructions, uncluttered worksheet sections, oral instructions and permission to dictate or audio-record responses.
• Support EAL learners with illustrated ingredient and technique vocabulary, paired rehearsal, teacher modelling and the option to explain decisions orally before writing.
• For students requiring practical support, pre-measure ingredients, reduce the number of available choices, allocate clear group roles and provide adapted tools or a no-cook design route.
• Advanced learners can optimise a recipe by controlling one variable at a time, calculate approximate cost or portion yield, compare two techniques, and justify a sustainable alternative using evidence from testing.
• Maintain clear allergy and food-safety boundaries: students must check labels, follow school procedures, avoid unapproved tasting and use non-food prototypes or concept drawings where necessary.