Other
Deutsch Lernen: German Lessons
The first eight lessons present basic rules of German Grammar and Language. Learn each concept on the beginning pages and click on the accompanying arrows for practice tests.
Quia
Quia: German Grammar Practice
High school German teacher Ed Curtis has created this site full of interactive general grammar exercises. Challenge yourself or your students to improve German language skills.
Other
El Easton: German Exercises, Quizzes, Tests and Games
A collection of quizzes, tests and games for improving German language skills.