Compare unit price and usable yield

Objective. Compare unit price and usable yield:apply the stated method to a concrete case,produce the requested evidence,and justify safe,private,and accessible choices.

About 25–50 minutes. The due date is chosen by a parent.

Split across sittings as needed;no timer or required date.Adult approval remains required even for independent work.

Materials: paper, pencil, optional calculator.

Unit price divides cost by a consistent amount, such as dollars per ounce or serving. Compare the same unit and include usable yield. A larger package may have a lower unit price but create waste or exceed upfront money. Use invented labels and a calculator if helpful. The best choice fits the actual constraint, not only the smallest number. Safety and boundaries: No purchase, event invitation, real guest, or personal receipt is required. Adult reviews allergens and manages heat/sharp tools; keep food safely cold/hot if any optional food is used. Family-only evidence;use fictional details,no faces or private records.No purchases are required.

Worked example

Unscored model for discussion;use the assignment case for your own work.

A$3 package with 6 usable servings costs$0.50 per serving; an$8 package with 20 costs$0.40 but needs more cash and storage.

Compare unit price and usable yield — evidence and reflection

1. Compare$4.80 for 12 ounces and$6.30 for 18 ounces.
2. If only 9 ounces of the larger package will be used before spoilage, find effective cost per used ounce.
3. Create a decision card considering unit price, upfront cost, storage, and waste.
4. Explain why different serving sizes can make a direct package comparison misleading.
5. Spiral review — Classify 3%DV, 20%DV, and 11%DV using the FDA low/high guide. Spiral review.

Acceptance checks

Address every numbered task with labeled,legible evidence and reasoning.
Use fictional records and family-only submissions;no public posting or sensitive personal data.
Paper/simulation earns the same credit as an approved physical demonstration.
Follow adult supervision,allergy,and stop rules;do not perform a hazard to prove understanding.
Completion records evidence present;accuracy,independence,and safety mastery are reviewed separately.

An adult supervises. This stays in the family. Spending is a simulation, not real money.

For any optional food,adult verifies all ingredients and established allergy needs;avoid cross-contact,no tolerance tests,and use paper food if uncertain.For clothing/cleaning,adult checks sensitivities and labels;no chemical mixing.

No purchase, event invitation, real guest, or personal receipt is required. Adult reviews allergens and manages heat/sharp tools; keep food safely cold/hot if any optional food is used.

Complete the entire task using paper diagrams,fictional data,empty/inactive tools,and parent-observed explanation.

No unsupervised heat,sharp tools,cleaners,or appliances.
No raw-meat handling,unsafe food tasting,chemical mixing,flame/smoke experiments,or electrical repair.
No real childcare/medical/intimate care,financial transactions,credentials,private records,or public posting.

Required. Read the complete on-page teaching/model with a parent or independently;external sites are not required.
Optional. Use one verified free reading for another explanation.Follow readingFocus and course safety/privacy limits.Skip external worksheets or steps asking for private data,purchases,or actions.

If this is still shaky. Use this lesson’s worked model to make a three-box process card.Label the goal,one safety/constraint check,and the evidence you would show.Explain it to a parent before trying the main task again.

Optional extra. Change one fictional constraint in this lesson,such as available time,access,ingredient restriction,or pretend cost.Revise one artifact and show what must change and what safety/privacy rule stays fixed.

Creating a Buying Plan
Read big idea/objectives; use our fictional buying scenarios. Do not write a public blog, shop, or make a purchase.
· Opening this link does not submit the lesson.

Name ____________________ Date ____________________