Thinking Summary · 1
MasteredEquation Logic: .
[Discovery] You have 78 units of kg. How many kg is that?
1
Active StepWelcome to "Star Map Distance", a 4th Grade Unitconversion mission at the Challenger (stretch) level, staged in our space exploration scenario. The mission opens with a hands-on prompt: "You have 78 units of kg. How many kg is that?" You'll reason about the numbers 78, 1, 1000 across 3 guided steps.
Behind the space exploration 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: Going the wrong way (dividing when you should multiply). Bigger unit → smaller unit = multiply (more pieces). Smaller → bigger = divide (fewer pieces). If you get stuck on "Star Map Distance", 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 78 units of kg. How many kg is that?
1
Active StepEverything you need to know about the Socratic experience.
You have 78 units of kg. How many kg is that? Hint: The starting amount is 78 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.
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.
Multidigitmult (Conversions exercise multi-digit multiplication and division.). Open /grade-4/multidigitmult to start that topic's missions.
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.
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.