Montana Math MT.1.MD.1
The Standard
Order three objects by length and compare the lengths of two objects indirectly by using a third object. This standard should incorporate cultural context relating to Montana Indigenous Peoples and local communities.
2026 Montana Mathematics Content Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students order three objects by length after lining up one end of each. They use a third object, such as a paper strip, to compare two things they cannot place side by side.
What Mastery Looks Like
- A student puts three sticks in order without being misled by where they start. They mark two ribbon lengths from the same point on a paper strip and explain which ribbon is longer.
Common Misconceptions
- Students may pick the object whose end sticks out farthest, even when the starting ends do not line up. They may start at different points on the comparison strip, making their marks misleading.
How to Assess It
- Give students three craft sticks to order and two ribbons taped to opposite sides of a folder. Ask them to use a paper strip to find the longer ribbon and explain their choice.
Lesson moves
Ways to Teach It
Tape two ribbons to opposite sides of a folder; children mark each length on the same paper strip to compare them.
Ask, “Why might the wrong pencil look longest if these three pencils do not start at the same place?”
Play longest-first: pairs draw three paper strips from a bag, line up their ends, and order them without a ruler.
Show a photo of a Blackfeet tipi from a tribal website, then compare two model poles taped to a box with a paper strip.
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Printable MT.1.MD.1 Worksheet
A ready-to-print activity worksheet aligned to MT.1.MD.1, with an answer key for the teacher on its own page. No account needed.
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