GRAMMAR
http://www.harcourtschool.com/activity/clubhouse/index.html
http://www.funbrain.com/verb/index.html?Grade=4
https://www.ixl.com/ela/grade-4
http://www.internet4classrooms.com/skill_builders/prefixes_language_arts_fourth_4th_grade.htm
http://www.eduplace.com/tales/
http://classroom.jc-schools.net/basic/la-grammar.html
Grammar Glossary - http://www.harcourtschool.com/glossary/grammar/index4.html
Schoolhouse Rock Lyrics - http://www.postdiluvian.org/~gilly/Schoolhouse_Rock/HTML/grammar/grammar.html
SPELLING
http://www.funbrain.com/spellroo/index.html
http://teacher.scholastic.com/activities/adventure/grammar4.htm
Ten Tips for a Better Spelling - http://www.factmonster.com/ipka/A0903395.html
Spelling Plural Nouns - http://www.factmonster.com/ipka/A0886509.html
Frequently Misspelled Words - http://www.factmonster.com/ipka/A0781709.html
VOCABULARY
http://www.superkids.com/aweb/tools/words/
WRITING
Practice Proofreading - http://www.eduplace.com/kids/hme/k_5/proofread/index.html
https://kidskonnect.com/language/figurative-language/
Using Commas in Writing - http://www.primaryresources.co.uk/online/lists1.htm