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Subjects:
Algebra
Art
Autism
Biology
Business
Calculus
Chemistry
Civics
Early Learning
Earth Science
English/Language Arts
ESL
Foreign Language
General Knowledge
Geography
Geometry
Grammar
Health and PE
History
Information Skills
Journalism
Life Science
Math
Music
Physics
Reading
Science
Social Studies
Special Needs
Speech and Language
Spelling
Teacher Resources
Technology
Test Prep
Trigonometry
Video
none
Hubble Space Images
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A huge collection of Hubble images: planets, stars, nebulae, galaxies and more.
Grades: 9 to 12
Downloads: 50,000-250,000
NASA App
NASA 
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The Official NASA App for Android
Grades: 6 to 12
Downloads: >250,000
Elements - Periodic Table
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Periodic table of the chemical elements
Grades: 9 to 12
Downloads: 50,000-250,000
Solar System Explorer Lite
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Take an interactive 3D trip through the solar system with Solar System Explorer!
Grades: 6 to 12
Downloads: 50,000-250,000
SAT Vocab Visuals & Audios
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Free
Finally on Android! This 5-starred featured app on iPhone now comes to Android (initially as lite version) with 50 most ...
Grades: 9 to 12
Downloads: 10,000-50,000
Mars Images
Powellware
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Free
Mars Images lets you browse the latest images from the Opportunity Mars Exploration Rover. Scroll through the thumbnails ...
Grades: 6 to 12
Downloads: 10,000-50,000
Flashcards+ Free
Allen Kou
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Free
Flashcards+ puts thousands of flashcards right into your phone for studying on the go. Create your own flashcards online ...
Grades: 6 to 12
Downloads: 50,000-250,000
Connected Mind (mind mapping)
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$0.99
Use your fingers to draw unique and memorable mind maps.
Grades: Pre-K to 12
Downloads: 1,000-5,000
Geological Time Scale
Dieter Franke
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Free
GeoTime - Simple and easy to use OFFLINE geological time scale.Relative time (chronostratic) subdivisions of the Earth ...
Grades: K to 12
Downloads: 10,000-50,000
ISS Detector
RunaR
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Free
See the International Space Station with the naked eye.
Grades: 6 to 12
Downloads: >250,000
Moto