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Math
Fractions
21 interactive lessons for building fraction sense
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Unit 1: What Fractions Really Mean
1
Parts of a Whole
A fraction is equal parts of one thing
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2
Fractions as Fair Sharing
3 ÷ 4 = 3/4 — fractions ARE division
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3
Fractions on a Number Line
Fractions are numbers, not just slices
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Unit 2: Same Amount, Different Names
4
Equivalent Fractions
1/2 = 2/4 = 3/6 — same spot, different cuts
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5
Simplifying Fractions
Find the simplest name for a fraction
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6
Comparing Fractions
Decide which fraction is bigger
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Unit 3: Adding & Subtracting
7
Adding (Same Denominator)
Just count the colored parts
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8
Why Common Denominators?
You cannot add different-sized pieces directly
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9
Adding (Different Denominators)
Rename, then combine
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10
Subtracting Fractions
Take away pieces with matching units
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Unit 4: Mixed Numbers & Improper Fractions
11
Beyond One Whole
5/4 means one whole and one more quarter
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12
Converting Forms
Improper fractions and mixed numbers are two names for the same amount
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13
Adding Mixed Numbers
Combine wholes and fraction parts
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Unit 5: Multiplying & Dividing
14
Fraction × Whole Number
Repeated groups of a fraction
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15
Fraction × Fraction
Use an area model to see part of a part
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16
Dividing by Fractions
How many small fraction pieces fit?
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Unit 6: Connecting the Dots
17
Fractions ↔ Decimals ↔ Percent
Three representations of the same amount
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18
Fractions in Real Life
Recipes, measurement, sharing, and probability
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Unit 7: From Decimals Back to Fractions
19
Decimals Are Fractions in Disguise
Every decimal has a hidden power-of-10 denominator
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20
Decimals You'll Recognize
Halves, quarters, fifths, eighths at a glance
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21
When Decimals Go On Forever
Repeating blocks come from 9s and 99s
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