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Complete the Words

Adaptive passages and question sets scored the moment you submit.

46 topics
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  • How Mangroves Protect Coastlines

    • Environmental science
    • 4 questions
    • 73 words
    • Level 3
  • How Cells Obtain Energy

    • Biology
    • 5 questions
    • 108 words
    • Level 3
  • The Life Cycle of Stars

    • Astronomy
    • 5 questions
    • 99 words
    • Level 4
  • The Spread of the Printing Press

    • History
    • 5 questions
    • 98 words
    • Level 3
  • How Memory Is Stored

    • Psychology
    • 5 questions
    • 95 words
    • Level 4
  • The Dance of the Honeybee

    • Animal behavior
    • 10 questions
    • 97 words
    • Level 2
  • Rivers of Ice on the Move

    • Earth science
    • 10 questions
    • 95 words
    • Level 4
  • How Desert Plants Make Food

    • Botany
    • 10 questions
    • 97 words
    • Level 3
  • The Rise of Paper Money

    • Economic history
    • 10 questions
    • 95 words
    • Level 2
  • Finding the Way South

    • Animal behavior
    • 10 questions
    • 96 words
    • Level 3
  • Islands Born From Fire

    • Geology
    • 10 questions
    • 96 words
    • Level 4
  • Splitting the Work in Early Factories

    • Industrial history
    • 10 questions
    • 93 words
    • Level 2
  • Hidden in Plain Sight

    • Biology
    • 10 questions
    • 97 words
    • Level 3
  • Water's Endless Journey

    • Earth science
    • 10 questions
    • 95 words
    • Level 2
  • Catching Light on a Plate

    • History of technology
    • 10 questions
    • 98 words
    • Level 3
  • Keeping the Noise Out

    • Architecture
    • 10 questions
    • 96 words
    • Level 3
  • Seeing With Sound

    • Animal behavior
    • 10 questions
    • 97 words
    • Level 4
  • Why Prices Keep Climbing

    • Economics
    • 10 questions
    • 98 words
    • Level 4
  • The Birth of Improvised Jazz

    • Music history
    • 10 questions
    • 95 words
    • Level 2
  • The First Settlers on Bare Rock

    • Ecology
    • 10 questions
    • 96 words
    • Level 3
  • Turning Wind Into Power

    • Engineering
    • 10 questions
    • 94 words
    • Level 4
  • Goods and Ideas on the Silk Road

    • World history
    • 10 questions
    • 95 words
    • Level 3
  • How Dolphins Rest at Sea

    • Marine biology
    • 10 questions
    • 94 words
    • Level 3
  • The Century Cities Swelled

    • Human geography
    • 10 questions
    • 97 words
    • Level 2
  • Reading the Story in Tree Rings

    • Climate science
    • 10 questions
    • 96 words
    • Level 3
  • The Clever Reach of the Octopus

    • Marine biology
    • 10 questions
    • 86 words
    • Level 3
  • Guilds and the Making of a Craft

    • Medieval history
    • 10 questions
    • 83 words
    • Level 3
  • Currents That Shape a Coast's Weather

    • Physical geography
    • 10 questions
    • 84 words
    • Level 4
  • How Advertising Works on the Mind

    • Psychology
    • 10 questions
    • 82 words
    • Level 3
  • The Cold Light of Fireflies

    • Biology
    • 10 questions
    • 82 words
    • Level 3
  • Lifting Boats with Canal Locks

    • Civil engineering
    • 10 questions
    • 87 words
    • Level 3
  • Keeping Folk Songs Alive

    • Cultural studies
    • 10 questions
    • 85 words
    • Level 3
  • When Bacteria Outlast Their Medicine

    • Microbiology
    • 10 questions
    • 83 words
    • Level 4
  • The Thawing of Frozen Ground

    • Earth science
    • 10 questions
    • 88 words
    • Level 4
  • From Trading Goods to Coins

    • Economics
    • 10 questions
    • 85 words
    • Level 3
  • The Surprising Strength of Spider Silk

    • Materials science
    • 10 questions
    • 85 words
    • Level 4
  • Caring for Objects in a Museum

    • Art conservation
    • 10 questions
    • 86 words
    • Level 4
  • Turning Tides into Electricity

    • Renewable energy
    • 10 questions
    • 91 words
    • Level 4
  • Reading the Behavior of Crowds

    • Social psychology
    • 10 questions
    • 85 words
    • Level 4
  • How Plants Send Their Seeds Traveling

    • Botany
    • 10 questions
    • 87 words
    • Level 3
  • Printing Patterns onto Cloth

    • Art and design history
    • 10 questions
    • 84 words
    • Level 3
  • Curtains of Light in the Polar Sky

    • Atmospheric science
    • 10 questions
    • 83 words
    • Level 4
  • Counting the Costs of Working Remotely

    • Labor economics
    • 10 questions
    • 89 words
    • Level 4
  • The Long Songs of Humpback Whales

    • Marine biology
    • 10 questions
    • 85 words
    • Level 3
  • Holding the Soil in Place

    • Agricultural science
    • 10 questions
    • 86 words
    • Level 3
  • Carrying Water Across Roman Valleys

    • Engineering history
    • 10 questions
    • 94 words
    • Level 4