| Refugee Child: My Memories of the 1956 Hungarian Revolution |
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| Re-Greening the Environment: Careers in Cleanup, Remediation, and Restoration |
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7.9 |
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| Relationships and Consent |
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| Religion in the Renaissance |
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8.6 |
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| Representation in Media |
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| Rights and Responsibilities |
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| River and Coast Geo Facts |
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| Rivers and Lakes Inside Out |
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6.3 |
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| Roberta Bondar: Canada's First Woman in Space |
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| Robotics |
|
6.2 |
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| Rockets and Missiles |
|
6.2 |
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|
| Sally Ride: The First American Woman in Space |
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| Scale Models: Making a Miniature Masterpiece |
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| Schizophrenia and Other Psychotic Disorders |
|
7.2 |
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| Science in the Renaissance |
|
8.2 |
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|
| Search for the Northwest Passage |
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| Searching for Extraterrestrials |
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6.5 |
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| Severe Storm and Blizzard Alert! |
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6.7 |
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| Sex |
|
6.1 |
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| Sexual Orientation and Gender Identity |
|
6.1 |
|
|
| Shark Attack |
|
4.0 |
|
|
| Significant Battles of World War II |
|
6.9 |
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| Significant People of World War II |
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6.4 |
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| Sir Isaac Newton |
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