another math dictionary from Math is Fun
Manipulatives of all kinds (Polypad from Mathigon)
online dotty grid
A bucketful of interactive environments: dice, spinners, geoboards…
roll multiple dice from 2 to 100 sides multiple times
Online tool for drawing squares & rectangles from Nrichmaths.org
Online Cuisenaire rods from Nrichmaths.org
online protractor
online base 10 blocks
online pattern blocks from mathtoybox.com
online Cuisenaire rods
Virtual Math Manipulatives (mathplayground)
National LIbrary of Virtual Math Manipulatives
Balances for balancing equations (also from NLVM)
virtual spinner (NCTM)
Tessellations by MC Escher
Math Games at Mathfrog
Square It game
Mathigon
Prime factorization visualizations
chess
chesskid.com is a safe, free site for kids to learn and play chess
Literacy
Online etymological dictionary (find out where words & their roots come from)
Young Readers Choice Awards
English vocabulary (links in other languages – best viewed in Google Chrome)
Parts of speech from Grammar Rock (& other Schoolhouse Rock videos)
Grammar Monster grammatical terms & definitions (rules explained)
KidsClick (a kid-friendly search engine)
Audio Books for Kids
Reading & other literacy activities from BBC
Grammar Bytes
digital literacy
Digital Compass (Common Sense Media)
Digital passport (Common Sense Media)
Blogging Rubric courtesy of Mr C Fisher, Snow Lake MB.
Great commenting guidelines from HUZZAH!, a class of student bloggers on Vancouver Island
tips on giving attribution & embedding images from Wikimedia commons also from our friends at HUZZAH! Thanks!
attribution for CC photos from Flickr using ImageCode.org (Thanks to B.L. Newman for the tip.)
Citing Sources for elementary school students from K Schrock
Douglas Road Library Web Resources (incl. World Book Student encyclopedia & GREAT DICTIONARY
List of genres of literature
Check out Scratch for learning about code, and check out this student project
Tech kids solving life’s problems in The Guardian
poetry
Classical Poems for Children (from storyit.com)
Searchable Index of poems & poets (from the Poetry Foundation)
Better than a thesaurus (from Lexical FreeNet)
Rhyming dictionary online (from Poetry4Kids – contains some ads)
Poetry dictionary (from Poetry4Kids)
Poetry writing tool from Scholastic
Limerick Factory
Literary devices (& other useful references)