The websites below have many good quality grammar/writing explanations and exercises. Unfortunately, many of the websites are old, ugly, and have lots of annoying ads. Look carefully to make sure you are clicking on the website exercises, not an ad.
This site is old and ugly, but it is a comprehensive grammar and writing resource. Explanations, quizzes and exercises about all aspects of American English grammar and writing.
In memory of Professor Charles Darling, who spent countless hours building the site and answering student questions.
ChompChomp is a playful website with grammar/writing explanations and exercises.
Many different types of ESL practice activities created by professional ESL teachers. The activities are classified by level and skill.
This website has many good free grammar explanations and exercises near the top of the page (click on the square pictures.) The bottom of the page offers paid lessons, which we do not recommend.
Many lessons on academic writing. Some grammar.
Many short grammar/writing exercises. Scroll past the ads to find the long list of exercise links.
Clear explanations and examples of many academic grammar/writing topics.