The Most Comprehensive List of Resources for Kid Writers on the Web!

Rachelle's Super-duper RESEARCH RESOURCES for kids, including government, science, history, biography, and the arts.
Go TeenWriters: encouragement, honesty, and community for teen writers.
* is a safe, FREE place for kids who like writing and are 14 and younger. Read the stories, poems, and non-fiction members (kids) have published.
Scribblitt: Kids Self Publishing site (stories and illustrations)
*Scriptito's Place  Places for young writers to publish/post their work, plus information on writing skills, contests, resources, illustration information, workshop, etc. 
*TeenCentral: Anonymously write out your feelings, no matter what the subject matter. Monitored by trained staff ; sponsored by KidsPeace, an org dedicated to helping kids in crisis.
Teen Ink: For teen writers and artists. Mag, website, & books written by teens.
TeenWriters Club: Place to share your writing. Free Membership. CONTESTS.
Teens Writing for Teens: A community of young adult fiction authors
WriteGirl  Pairs girls in grades 9-12 with practicing writers through monthly workshops. 
Writethe World  "An online global community for high school publish their work and refine their craft through the establishment of a regular writing routine, an attention to revision, enter free writing competitions, and access to quality feedback both from experts in the field and the wider Write the World community." 
RhymeZone: Rhyming dictionary. A must-have for all poets! Also has thesaurus.

Poetry4KidsKen Nesbitt provides funny poem, poetry lessons & activities, rhyming dictionary, videos
ReadWriteThink Poetry Interactives: online tool. Students learn about and write various types of poems—acrostic, diamante, haiku, shape and more.

River of Words International Art and Poetry Contest guidelines, with categories for ages 5-19

Blue Pencil   The magazine seeks to publish the best of literary work by young writers (12–18) around the world. Also offers a scholarship prize (click "The Bishop Prize"). 
California Young Playwrights:  Contest for Californians under age 19
Canvas Literary Journal:  by teens for teens submission guidelines for ages 13-18 
The Children's Writers and Illustrators Market.  has a section for "Young Writers & Illustrator's Markets." The "Awards & Grants" section also lists those which are exclusive to school age writers
Crashtest Magazine: writing contests twice a year
Guardian Angel Publishing   publishes ebooks for kids, by kids. Books chosen through CONTESTS that schools must apply to participate in.
HUNGER MOUNTAINAnnual writing contest for high school kids
Kay Snow Writing Contest Guidelines for grades 1-12  No entry fee for student writers--scroll down to "Student Writer" section of guidelines 
Kids-Write-4-Kids creative-challenge:  safe, FREE place for kids who like writing; 14 and younger. Read the stories, poems, and non-fiction members (kids) have published. CONTESTS
Merlyn's Pen  A literary magazine for and by young writers. 
Movellas    A community where young writers (primarily teens) can publish stories and poetry and get feedback. It offers a number of competitions, forums and a blog. It can also be accessed through an app.
Mrs.P.coma storybook entertainment site, holds "be-a-famous-writer contest for kids 4-13.
TheMystic Blue Review submission guidelines for writers and illustrators/photographers ages 13 and up
NEW MOON magazine submission guidelines for girls ages 8-14
One Teen Story: Magazine by and for teens 13-19. Submission guidelines, writing contests.
Poetic Power   Free contests in poetry and fiction writing and is judged by teachers and educators. 
PBS Kids Writers Contests for grades K-3NOTE: Please google "PBS kids writing contest" to find a contest through your local PBS station.
Read Write and Imagine    Read stories by other teens and post your own. 
Rookie Magazineonline magazine and book series. Publishes writing, photography, and artwork by and for teenagers.
Scholastic Art and Writing Awardfor students in grades 7-12
Student Treasures Publishing Kits (PreK-6): Must be ordered by teachers
Scriptito's Place  Places for young writers to publish/post their work; info on writing skills, contests, resources, illustration, workshop, etc. 
Seshat Homeschool LiteraryMagazine submission guidelines for ages 13 and up
Societyof Young Inklings: Supports young writers. publishing opportunities
Story Monsters  Kids Literary Magazine. "Student writers wanted"
StoryJumper.comCreate your own books and share it online
Story Pirates: Have your original story performed in a podcast!
Sweet Designs Magazine  Written by & for teen girls & young adult women, ages 13 - 25.
TEEN INK submission guidelines for ages 13-19  monthly magazine, website, and a book series, written by teens for teens. 16,000+ pages of student writing on this site. 
THEWRITING CONFERENCENonprofit writing services, including contests for grades K-12
Young Writers Magazine Stories, Poems, and Essays by Teens
Young Writers Project:  online support and publishing opportunities for young writers and artists.
Resources for TEEN WRITERS (Yvonne Ventresca's site). Interviews with editors who publish teens and young writers, other potential places to send your writing, advice from authors, books and resources about writing, plus more!
Resources for Teen and Pre-Teen Writers and Their Teachers-writing prompts, publishing opportunities (Heather E. Wright) Guidance, inspiration or prompts. It offers resources for teens and younger writers (including prompts), market information, and tips on teaching creative writing.  
Story Mapping:  resources for parents and teachers   An interactive online writing guide - Helps create characters, setting, conflict, & resolution

The Writers Circle: Creative Writing Workshops   ( FEE BASED PROGRAMS for both adults and for kids grades 3-12). Virtual
Write the World: Summer writing camp for ages 13-19. (nonprofit organization)

The Most Comprehensive List of Resources for Kid Writers on the Web!

RESEARCH RESOURCES KID-FRIENDLY Research Websites  and Search Engines :  Rachelle's Super-duper RESEARCH RESOURCES for kids, inc...