US homeschool curriculum · 3rd grade

3rd Grade Math

A self-paced online Math course for 3rd grade: 41 lessons across 8 units. A short placement quiz finds the right starting point, practice adapts as your child answers, and every lesson is marked automatically with progress reported to you.

• Every lesson has at least two different question styles, with hints and step-by-step worked solutions.
• Struggling triggers a gentler re-teach and a warm-up on the missing building block — never a visible drop in score.
• Work this course at its own level: a child can take 3rd Grade Math alongside a different grade in Language Arts.

What your child learns

The scope and sequence below is generated from the live curriculum, so it is always what the app actually teaches.

• Number and place value

  • Count in 6s, 7s, 9s, 25s and 1,000s: Can continue a sequence counting in 6s, 7s, 9s, 25s or 1,000s.
  • 1,000 more or less: Can find 1,000 more or less than a given number.
  • Negative numbers: Can count backwards through zero and order negative numbers.
  • Thousands, hundreds, tens and ones: Can say what each digit in a four-digit number is worth.
  • Compare and order numbers beyond 1,000: Can compare and order numbers up to 10,000.
  • Round to the nearest 10, 100 or 1,000: Can round any number to the nearest 10, 100 or 1,000.
  • Roman numerals to 100: Can read Roman numerals from I to C.

• Addition and subtraction

  • Column addition (up to four digits): Can add numbers with up to four digits using the column method.
  • Column subtraction (up to four digits): Can subtract numbers with up to four digits using the column method, with exchanging.
  • Estimate and check: Can estimate by rounding and check with the inverse for four-digit numbers.
  • Two-step word problems: Can solve two-step addition and subtraction problems, deciding which operations to use.

• Multiplication and division

  • Times tables to 12 × 12: Can recall every multiplication and division fact up to 12 × 12.
  • Multiply by 0 and 1, divide by 1: Knows what happens when you multiply by 0 or 1, or divide by 1.
  • Factor pairs: Can find all the factor pairs of a number.
  • Multiply three numbers: Can multiply three one-digit numbers together, choosing the easiest order.
  • Multiply by 10 and 100: Can multiply a whole number by 10 or 100 by moving the digits.
  • Three-digit times one-digit: Can multiply a three-digit number by a one-digit number using a written method.
  • Multiplication and division problems: Can solve problems involving multiplying and dividing, including scaling and correspondence.
  • Multiplication as equal groups: Can read a product like 5 × 3 as 5 groups of 3 and write a multiplication for equal groups.

• Fractions (and decimals, percentages)

  • Equivalent fractions: Can find equivalent fractions and simplify simple ones.
  • Count in hundredths: Knows that hundredths come from dividing into 100 parts and can count in them.
  • Fractions of amounts: Can find a non-unit fraction of a quantity, including with larger numbers.
  • Add and subtract fractions: Can add and subtract fractions with the same denominator, including answers over one whole.
  • Tenths and hundredths as decimals: Can write tenths and hundredths as decimals (e.g. 7/10 = 0.7, 23/100 = 0.23).
  • Decimal equivalents of 1/4, 1/2 and 3/4: Knows that 1/4 = 0.25, 1/2 = 0.5 and 3/4 = 0.75.
  • Divide by 10 and 100: Can divide a one- or two-digit number by 10 or 100, giving a decimal answer.
  • Round decimals to the nearest whole number: Can round a number with one decimal place to the nearest whole number.
  • Compare decimals: Can compare and order numbers with up to two decimal places.
  • Equal parts and unit fractions: Can say what fraction one piece is when a whole is cut into equal parts.

• Measurement

  • Convert units of measure: Can convert between km and m, m and cm, kg and g, l and ml, hours and minutes.
  • Perimeter of rectilinear shapes: Can find the perimeter of an L-shape or rectangle from its side lengths.
  • Area by counting squares: Can find the area of a rectangle by counting or multiplying squares.
  • Area and unit squares: Knows area is counted in square units and can find the area of a rectangle covered in unit squares.

• Geometry: properties of shapes

  • Types of triangle and quadrilateral: Can name triangles (equilateral, isosceles, scalene, right) and quadrilaterals (square, rectangle, rhombus, parallelogram, trapezoid, kite) from their properties.
  • Acute and obtuse angles: Can identify acute, right and obtuse angles and order angles by size.
  • Lines of symmetry: Knows how many lines of symmetry common 2D shapes have.

• Geometry: position and direction

  • Coordinates in the first quadrant: Can read and plot coordinates (x, y) in the first quadrant.
  • Translations: Can describe a movement left/right and up/down and find where a point ends up.

• Statistics

  • Bar graphs and time graphs: Can read values from a bar graph or a time graph and compare them.
  • Sum and difference problems from data: Can answer comparison, sum and difference questions using a chart or table.
  • Line plots with halves and quarters: Can read a line plot whose measurements are to the nearest half or quarter unit.

← 2nd Grade Language Arts3rd Grade Language Arts →Start a free trial