Welcome to "Flour Sack Stacker", a 1st Grade Place Value mission at the Challenger (stretch) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "Build 52 with base-ten blocks. Use 5 ten-rods and 2 units." You'll work with the numbers 52, 5, 2 and arrive at a final answer of 60 across 3 guided steps.
Behind the bakery story, this lesson is really about place value aligned to CCSS 1.NBT.B.2. Understanding that two-digit numbers are built from tens and ones — the power of grouping by 10. The key strategy this mission asks you to internalise: Position gives value: tens digit × 10.
A general pattern to watch for in 1st Grade place value — illustrated with example numbers below, which may differ from this lesson's: Treating each digit as just its face value. Ask: "In 37, how much is the 3 really worth?" Answer: 30, not 3. Repeat daily. If you get stuck on "Flour Sack Stacker", 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 1 · Placevalue
Mission Progress
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Thinking Summary · 1
Mastered[object Object]
[Discovery] Build 52 with base-ten blocks. Use 5 ten-rods and 2 units.
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Active StepBuild the number 52 using flats, rods, and units.
1st Grade Place Value 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 base-ten model to move from the story to a precise place value idea. Work through the prompts in order: notice the structure first, name the quantities, then check whether the final answer fits the original situation.
In 1st Grade Place Value, students need to connect the story, the model, and the symbolic answer. The core move here is: Position gives value: tens digit × 10. A useful check is to ask whether the answer avoids this pitfall: Writing 24 as "204" (thinking 2 tens + 4 ones = "204"). The tens digit already *counts* tens. You don't add a zero — position does the work.
