🔢 3rd grade Math

Units

1. Unit 1

   ➕Add & Subtract

   Adding and subtracting 2- and 3-digit numbers by place value, number-line jumps and counting up, plus estimating by rounding to the nearest hundred.

   Content standard: 3.11 · fluently adding and subtracting within 1000

2. Unit 2

   ✖️Multiplication

   Understanding multiplication as equal groups, arrays, repeated addition and skip counting. Easier sets use 2s, 5s and 10s; stretch sets go beyond 5 × 5.

   Content standard: 3.1; 3.5; 3.7 · multiplication as equal groups, properties of multiplication, and multiplying within 100

3. Unit 3

   ➗Division

   Understanding division as sharing fairly and as making equal groups, and using multiplication facts to divide (3 × 4 = 12, so 12 ÷ 3 = 4).

   Content standard: 3.2; 3.6; 3.7 · division as sharing into equal groups and as an unknown factor, and dividing within 100

4. Unit 4

   🍕Fractions

   Naming fractions of a shape, a set and a number line, knowing what the top and bottom numbers mean, and comparing fractions by the size of their parts.

   Content standard: 3.13; 3.14; 3.15 · unit fractions, fractions on a number line, and comparing fractions

5. Unit 5

   📈Patterns & Equations

   Extending increasing and decreasing patterns, describing pattern rules in words and tables, and solving one-step equations like ☐ + 8 = 23.

   Content standard: 3.4; 3.9 · finding unknown numbers in multiplication and division equations and explaining arithmetic patterns

6. Unit 6

   📏Measuring

   Measuring with centimeters and meters, grams and kilograms, milliliters and liters: choosing sensible units, estimating, comparing and solving measurement problems.

   Content standard: 3.19 · estimating and measuring liquid volumes and masses in liters, grams and kilograms

7. Unit 7

   ⏰Time

   Telling time on an analog clock, working out start and end times, and knowing how seconds, minutes, hours, days, weeks, months and years relate.

   Content standard: 3.18 · telling time to the nearest minute and solving elapsed-time problems

8. Unit 8

   🎯Round & Count

   Rounding numbers to the nearest ten or hundred, counting forward and back by 50s, 100s and 200s, and comparing and ordering numbers up to 1000.

   Content standard: 3.10 · rounding whole numbers to the nearest 10 or 100

9. Unit 9

   📐Area & Perimeter

   Finding the perimeter (distance around) of rectangles and triangles, finding a missing side, and measuring area in square centimeters and square meters.

   Content standard: 3.20; 3.21; 3.22; 3.25 · measuring area with unit squares, relating area to multiplication, and solving perimeter problems

10. Unit 10

    🔷Sorting Polygons

    Practices naming polygons by their number of sides and sorting them as regular (all sides and angles equal) or irregular.

    Content standard: 3.26 · describing triangles, quadrilaterals and other polygons by their sides and angles

11. Unit 11

    🔟Times Tens

    Multiplying a one-digit number by a multiple of ten (like 6 × 40) using a basic fact and place value.

    Content standard: 3.12 · multiplying one-digit whole numbers by multiples of 10 from 10 to 90

12. Unit 12

    🪜Two-Step Stories

    Word problems that take two steps with any of the four operations, choosing an equation with a letter for the unknown, and checking an answer by estimating.

    Content standard: 3.8 · solving two-step word problems with the four operations and checking answers by estimating

13. Unit 13

    📐Halves & Fourths of an Inch

    Measuring lengths to the nearest half and quarter inch, then reading the measurements from a table like a line plot.

    Content standard: 3.17 · measuring lengths to the nearest half and fourth of an inch and showing the data in a line plot

14. Unit 14

    📊Scaled Graphs

    Reading picture graphs and bar graphs where each picture or step stands for 2, 5 or 10, answering how many more and how many in all, and choosing questions a survey can answer.

    Content standard: 3.16 · drawing and reading scaled picture graphs and bar graphs