Sophia Learning
Sophia: Passive and Active Voice
A screencast [5:40] demonstrating how to write a sentence in active voice or in passive voice, followed by a downloadable nine-page PDF describing passive voice and its appropriate uses.
Online Writing Lab at Purdue University
Purdue University Owl: Active and Passive Voice
A good resource that clearly outlines the differences, uses, and purposes of the active and passive voice, both in writing and in verb construction. Includes charts and examples. Click through all the sub-topics for the complete...
ReadWriteThink
Read Write Think: An Active & Passive Voice Mini Lesson
Lesson which allows students to explore active/passive voice verb choice through numerous online resources, and then apply these principles to their own writing style.