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Grade 3 Mathematics

The Ontario Grade 3 Mathematics course has six strands: Social-Emotional Learning Skills and the Mathematical Processes, Number, Algebra, Data, Spatial Sense and Financial Literacy. The museum maps parts of strands B to E; strand A names skills only and strand F is in the gap register.

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Draft: these lessons were written with AI help and have not yet been read by a human editor.

Strand B: Number

Numbers and operations in everyday life (overall expectations B1 and B2). One lesson is linked; the other expectations of the strand are in the gap register.

  1. Numbers written in places Reading and representing numbers up to 1000 by place value, and adding and subtracting them in writing by steps. Invention

Strand C: Algebra

Patterns, variables and equalities (overall expectations C1 and C2). The coding expectations of this strand are in the gap register.

  1. Patterns of stars and polygons Finding what repeats in a pattern, and creating and showing patterns with shapes, numbers and tables. Object
  2. An unknown quantity Describing how a variable stands for an unknown, and using one in problems. Invention

Strand D: Data

Collecting, organizing and reading data (overall expectation D1). The expectations on likelihood are in the gap register.

  1. Counting to find out Reading a recorded count by asking questions and drawing conclusions. Story

Strand E: Spatial Sense

Shapes, structures and measurement (overall expectations E1 and E2). Three lessons are linked.

  1. Ceilings made of cells Taking a structure apart into the flat shapes and solid objects it contains. Invention
  2. Two scoops of different size Measuring the same thing with units of different sizes, and seeing that the count changes while the amount stays the same. Object
  3. Measuring a surface by a cubit Measuring area with a non-standard unit, and noticing how gaps and overlaps change the count. Invention

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