Fred’s Head Companion
for these links.
Punctuation Made Simple
First, there’s a great writing tool for all, particularly any student with a writing or cognitive disability, at
Punctuation Made Simple.
The site, hosted by The College of Arts & Sciences at Illinois State University, has links specific to using colons, semicolons, commas, and dashes.
Big Dog's Grammar
The second resource is
Big Dog’s Grammar,
which touts itself as, "Basic English grammar with interactive exercises."
The site has links for MLA style, pronoun use, active/passive voice, and various forms of modifiers, as well as some other nuggets of wisdom.
It also has an option to read the web site in Spanish, an alternative I think would be a great asset for Spanish speakers who are taking English classes.