Numbers & Operations in Base 10

By Platform Administrator · Submitted Sep 30, 2026

Content Area: Mathematics
Grade: K

The teacher demonstrates modeling composing a teen number (11-19) using a set of materials (e.g., pony beads, legos, colored bears, chain links, stickers, dobbers, bingo chips), making sure to use different colors (1 color for a group of 10 and 1 color for the further ones). Students then choose a number from 11-19, and a set of materials with each having different colors, and use the materials to demonstrate the number they selected. After posting student projects around the room, the teacher models decomposing numbers. Students then go around the room and decompose three of the posted student projects on separate paper.

MA Standard

K.NBT.A.1

Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones

Resources

Task Template (PDF) PDF · 146 KB
Task Template (Word) DOCX · 1.59 MB
Rubric DOCX · 1.54 MB
Recording Sheet DOCX · 37.7 KB

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