Medallion Press is looking to showcase aspiring authors between the ages of 13 and 18. They're interested in a variety of fiction genres, and you can check out their submission guidelines here:
http://www.medallionpress.com/guidlines/index.html
This is the main page for their YA-YA (young adults writing for young adults):
http://www.medallionpress.com/genres/ya_ya/index.html
Take the time to go look it over! They also have a Twitter account at:
http://twitter.com/Readsalotish
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