Welcome to "Pastry Skip Lab", a Grade 2 Skip Counting by 5, 10, 100 mission at the Explorer core practice level, staged in a bakery scenario. The mission opens with a hands-on prompt: "Start at 25 and skip-count by 5. Place 50 on the number line." Students work with the numbers 25, 5, 50 and reach a final answer of 5 across 3 guided steps.
Behind the story, this lesson builds skip counting by 5, 10, 100 understanding aligned to CCSS 2.NBT.A.2. The key strategy is: 50 + 5 = 55.
A common misconception this page surfaces is: Losing place at hundreds boundaries (e.g. 95, 100, ?). Slow down at the boundary. 100 is just 10 tens — skip-counting doesn't break, the writing does. The adaptive Socratic hints move from a small nudge to a fuller strategy, keeping the reasoning visible for students, parents, and teachers.
Grade 2 · Skip Counting by 5, 10, 100
Mission Progress
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Thinking Summary · 1
Mastered[object Object]
[Discovery] Start at 25 and skip-count by 5. Place 50 on the number line.
1
Active StepPlace the marker on 50.
Everything you need to know about the Socratic experience.
Start at 25 and skip-count by 5. Place 50 on the number line. Hint: Each tick is +5. Count: 25, 30, 35, …
How many jumps of 5 are needed to go from 25 to 50? If you get stuck, the adaptive hint is: (50 − 25) ÷ 5 = 5.
Explorer missions hit the core abstraction at typical numeric ranges — this is where conceptual mastery is built. Within Grade 2 Skip Counting by 5, 10, 100, expect numbers in the corresponding range.
Losing place at hundreds boundaries (e.g. 95, 100, ?). Slow down at the boundary. 100 is just 10 tens — skip-counting doesn't break, the writing does.
Place Value to 1000 (Skip counting by 100 makes the hundreds column tangible.) Open /grade-2/placevalue 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.
C-P-A is the Singapore Math sequence proven to deepen number sense: first manipulate physical objects (Concrete), then draw pictures of them (Pictorial), and only then write equations (Abstract). Inquiry AI structures every mission as exactly these three steps — a manipulative, a picture/grid model, and finally the equation. Skipping straight to symbols is the #1 cause of math anxiety; the platform refuses to do it.
