Other
English Grammar 101: Adverbs Modifying Verbs
Learn how adverbs modify verbs in this concise lesson. Practice what you learn with a quiz which gives immediate feedback.
Khan Academy
Khan Academy: Using Adverbs and Adjectives
Identify when to use adverbs and when to use adjectives.
Other
Adverbs That Modify Adjectives
This tutorial shows how adverbs modify adjectives and other adverbs. It also has a 10-question printout quiz.
Education Place
Houghton Mifflin: Eduplace: Grammar Blast: Adjectives and Adverbs
A quiz to assess student understanding of adjectives and adverbs is included on this site.