Thinking Summary · 1
MasteredVisual Logic: 0 of 1 parts shaded.
[Discovery] Shade 15/18 on a fraction bar, then add 7/18 more by shading additional parts.
1
Active StepWelcome to "Pancake Mixed Number", a 4th Grade Addfractions mission at the Challenger (stretch) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "Shade 15/18 on a fraction bar, then add 7/18 more by shading additional parts." You'll work with the numbers 15, 18, 7 and arrive at a final answer of 1 across 3 guided steps.
Behind the bakery story, this lesson is really about addfractions aligned to CCSS 4.NF.B.3. Add and subtract fractions with like denominators, including mixed numbers, by joining and separating parts referring to the same whole. The key strategy this mission asks you to internalise: Top: 15 + 7, bottom unchanged.
A general pattern to watch for in 4th Grade addfractions — illustrated with example numbers below, which may differ from this lesson's: Adding both numerators AND denominators (2/8 + 3/8 = 5/16). Denominators name the slice size — they don't add. Only the numerators (the count) add. If you get stuck on "Pancake Mixed Number", 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 · Addfractions
Mission Progress
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Thinking Summary · 1
MasteredVisual Logic: 0 of 1 parts shaded.
[Discovery] Shade 15/18 on a fraction bar, then add 7/18 more by shading additional parts.
1
Active StepEverything you need to know about the Socratic experience.
Shade 15/18 on a fraction bar, then add 7/18 more by shading additional parts. Hint: Bar has 18 parts. Shade 15, then 7 more (total 22).
If 22/18 is improper (numerator ≥ denominator), how many WHOLES does it contain? If you get stuck, the adaptive hint is: 22 ÷ 18 = 1 r 4.
Challenger missions push beyond CCSS expectations with edge cases that surface deeper misconceptions. Within 4th Grade Addfractions, expect numbers in the corresponding range.
Forgetting to convert mixed numbers before adding. Either add the whole parts and fraction parts separately, or convert both to improper fractions first. Pick one — and stick with it.
Multiplyfractions (Multiplication by a whole is repeated like-fraction addition.). Open /grade-4/multiplyfractions to start that topic's missions.
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.
Inquiry-based learning starts with a question, not a formula — students explore, hypothesize, and verify before being told the rule. In Inquiry AI, every mission opens with a "Discovery" step (manipulate the model), then "Abstraction" (write the equation), then "Reflect" (apply to a new case). The procedure is never given upfront; learners derive it from their own observations.