Families brought kids to pools across Texas Thursday for the "World's Largest Swimming Lesson." The World Waterpark Association launched the project in 2010 and says 383,000 people in 53 countries have participated since then.

<p>Families brought kids to pools across Texas Thursday for the "World's Largest Swimming Lesson." The World Waterpark Association launched the project in 2010 and says 383,000 people in 53 countries have participated since then.</p>

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