Welcome to "Donut Speed Baker", a 6th Grade Unitrate mission at the Challenger (stretch) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "2016 items in 72 groups. Show the groups equally split." You'll work with the numbers 2016, 72, 28 and arrive at a final answer of 280 across 3 guided steps.
Behind the bakery story, this lesson is really about unitrate aligned to CCSS 6.RP.A.2. Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0. The key strategy this mission asks you to internalise: Answer: 28.
A general pattern to watch for in 6th Grade unitrate — illustrated with example numbers below, which may differ from this lesson's: Reversing numerator and denominator (mph vs hpm). The unit you want as 1 goes in the DENOMINATOR. mph means miles per (one) hour. If you get stuck on "Donut Speed Baker", the adaptive Socratic hints below escalate from a gentle nudge to a worked-out strategy — the same way a one-on-one tutor would coach you through it.
Grade 6 · Unitrate
Mission Progress
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Thinking Summary · 1
Mastered[object Object]
[Discovery] 2016 items in 72 groups. Show the groups equally split.
1
Active StepDistribute items equally among groups
Everything you need to know about the Socratic experience.
2016 items in 72 groups. Show the groups equally split. Hint: Divide 2016 ÷ 72 to find per-group amount.
If the rate is 28 per group, how many in 10 groups? If you get stuck, the adaptive hint is: Answer: 280.
Challenger missions push beyond CCSS expectations with edge cases that surface deeper misconceptions. Within 6th Grade Unitrate, expect numbers in the corresponding range.
Comparing unit prices in different units. Convert to the same unit first. $/oz vs $/lb gives nonsense unless you convert.
Ratios (A unit rate is a ratio scaled so the second term is 1.). Open /grade-6/ratios to start that topic's missions.
Yes. Every mission, handbook page, and topic hub is mapped to a specific CCSS code (visible in the page header). The curriculum follows the CCSS coherence map: Grade 1 number sense → Grade 3 multiplicative thinking → Grade 6 ratio reasoning, with each grade building strictly on the prior year's foundations.
Pure discovery is inefficient — kids hit a wall and quit. Guided Discovery scaffolds the path: a careful sequence of questions, models, and adaptive hints leads the learner toward the insight without revealing it. Inquiry AI's hint system fires automatically after ~15s of hesitation or on the first mistake, escalating from a Socratic nudge to a worked example only when needed. Mistakes are diagnosed via "misconception keys" so the hint matches the actual wrong-thinking pattern.
