| Tulsa Race Riots and the Red Summer of 1919 |
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| Two Sides of an Argument: Speech and Debate (6 titles) |
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| Udder to Cheddar |
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5.4 |
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| Underdogs: Sports Champions (6 titles) |
New
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| Understanding Alcohol |
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| Understanding and Creating Infographics |
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5.8 |
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| Understanding Data Visualizations |
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| Understanding Drugs |
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| Understanding Eating Disorders |
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| Understanding Insects |
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| Understanding Investing |
Soon!
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| Understanding Mental Health |
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| Understanding Obesity |
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| Understanding Screen Addiction |
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| Understanding Sound |
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4.9 |
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| Understanding Suicide |
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| Understanding Taxes |
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5.6 |
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| Understanding Taxes |
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5.8 |
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| Understanding Tobacco |
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| Under the Witch's Spell |
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