Welcome to "Donut Tray Skip", a Grade 2 Skip Counting by 5, 10, 100 mission at the Challenger stretch problem level, staged in a bakery scenario. The mission opens with a hands-on prompt: "Start at 0 and skip-count by 100. Place 400 on the number line." Students work with the numbers 0, 100, 400 and reach a final answer of 4 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: 400 + 100 = 500.
A common misconception this page surfaces is: Adding 1 instead of the chosen step (e.g. counting by 5 → 5, 6, 7…). State the rule first: "every jump = +5." Then chant the sequence so the rule sticks before the next number. 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 0 and skip-count by 100. Place 400 on the number line.
1
Active StepPlace the marker on 400.
2nd Grade Skip Counting by 5, 10, 100 challenger-1 representative practice page for students who need a crawlable, worked entry point into the topic without exposing every near-duplicate long-tail mission.
This challenger · stretch problem mission uses a number line to move from the story to a precise skip counting by 5, 10, 100 idea. Work through the prompts in order: notice the structure first, name the quantities, then check whether the final answer fits the original situation.
Common wrong turn: 0 is where we BEGIN. We need to land on 400.
Common wrong turn: That's the PREVIOUS number, not the next.
Common wrong turn: Off by one — the start tick (0) is NOT a jump, it's the launching pad.
In 2nd Grade Skip Counting by 5, 10, 100, students need to connect the story, the model, and the symbolic answer. The core move here is: 400 + 100 = 500. A useful check is to ask whether the answer avoids this pitfall: Adding 1 instead of the chosen step (e.g. counting by 5 → 5, 6, 7…). State the rule first: "every jump = +5." Then chant the sequence so the rule sticks before the next number.
