Quia.com - Type in the topic and search through fun games, activities, etc. StudySpanish.com - Choose the topic on the left for online quizzes and explainations. Conjuguemos.com - An EXTREMELY USEFUL website to practice verb conjugation, vocabulary, and grammar topics. It can be tailored for certain forms, verbs, specific words, anything a student is struggling with. Colby Grammar Practice - Grammar topics practiced through real life stories and situations.