Thanks to Australian teacher, Brian Shaw, who sent me a note about Mockaroo, which lets you generate up to 100,000 rows of realistic test data in CSV, TXT, SQL, and JSON formats. Data fields can be customised to make the data in basically any range you may like. This is tremendously useful for students learning about spreadsheets, databases, programming and web design!
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The URL: http://www.mockaroo.com/