Welcome to "Orbit Hop Counter", a Grade 2 Skip Counting by 5, 10, 100 mission at the Explorer core practice level, staged in a space scenario. The mission opens with a hands-on prompt: "Start at 40 and skip-count by 10. Place 80 on the number line." Students work with the numbers 40, 10, 80 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: 80 + 10 = 90.
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
0/3
Thinking Summary · 1
Mastered[object Object]
[Discovery] Start at 40 and skip-count by 10. Place 80 on the number line.
1
Active StepPlace the marker on 80.
2nd Grade Skip Counting by 5, 10, 100 explorer-2 representative practice page for students who need a crawlable, worked entry point into the topic without exposing every near-duplicate long-tail mission.
This explorer · core practice 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: 40 is where we BEGIN. We need to land on 80.
Common wrong turn: That's the PREVIOUS number, not the next.
Common wrong turn: Off by one — the start tick (40) 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: 80 + 10 = 90. A useful check is to ask whether the answer avoids this pitfall: 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.
