Thinking Summary · 1
MasteredEquation Logic: .
[Discovery] You have 42 units of kg. How many kg is that?
1
Active StepWelcome to "Flour Kilogram Lab", a 4th Grade Unitconversion mission at the Challenger (stretch) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "You have 42 units of kg. How many kg is that?" You'll reason about the numbers 42, 1, 1000 across 3 guided steps.
Behind the bakery story, this lesson is really about unitconversion aligned to CCSS 4.MD.A.1. Know relative sizes of measurement units within one system; convert from a larger unit to a smaller unit. The key strategy this mission asks you to internalise: Bigger unit → smaller unit means multiply.
A general pattern to watch for in 4th Grade unitconversion — illustrated with example numbers below, which may differ from this lesson's: Confusing 1 m = 100 cm with 1 m = 10 cm. Memorise the table. Better yet, look at a metre stick — count the cm marks: there are 100. If you get stuck on "Flour Kilogram Lab", 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 4 · Unitconversion
Mission Progress
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Thinking Summary · 1
MasteredEquation Logic: .
[Discovery] You have 42 units of kg. How many kg is that?
1
Active StepEverything you need to know about the Socratic experience.
You have 42 units of kg. How many kg is that? Hint: The starting amount is 42 kg.
Which is longer: 1 kg or 1 g? If you get stuck, the adaptive hint is: kg > g.
Challenger missions push beyond CCSS expectations with edge cases that surface deeper misconceptions. Within 4th Grade Unitconversion, expect numbers in the corresponding range.
Mixing units in the same calculation. Convert everything to ONE unit before adding or comparing. 1 m + 50 cm = 100 cm + 50 cm = 150 cm.
Conversions (Grade 5 extends to cross-system (e.g., km ↔ miles).). Open /grade-4/conversions 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.