Phonics and Early Reading
Word Magnets
Scholastic
Reading Bear
StoryNory (free audio stories for kids)
Story Online (stories read aloud by well-known actors)
Turtle Diary (Pre-K-3rd)
Dove Whisper
Giggle Poetry
TumbleBooks (animated talking ebooks) 
Story Jumper
DOGO News
Mrs. Pluta's 4th Grade (3-5 Reading comprehension sites list)
Mr. Nussbaum
Kidzone Poetry Projects
Diamante Poem Creator
WriteReader
​Story Bird
​Phonics Hero
​Big List of Websites for Elementary Teachers
​Epic! for Educators

Middle/High School
English Maven
Lit 2 Go (collection of literature in MP3 format; can be downloaded as PDF)
Vocabahead 
Teachers
Arts Alive
BiblioNasium
Actively Learn
LitCharts
Enotes
Internet4Classrooms
 (analogies)
FreeNotes
Poets
SuperSummary (study guides for fiction and non-fiction books)
Vocabulary
​Fun With Words
​Types of Poetry
Web English Teacher
​Literary Terms
Scholastic Poetry Starter
​Plagiarism Tracker
A Word a Day
Write the World
​The Literacy Shed
​The Writing Center

All Levels
ReadWriteThink
Books Should be Free
Share My Lesson (Presentations and websites built by teachers)
Free Book Sifter
Rhymes
Grammaropolis
Shelfari
Citation Machine
Spelling City
No Red Ink
PBS Masterpiece
​ReadWorks
​Listenwise
​Book Creator
​Wonderopolis
​Newsela
Literator