There are lots of sites that have fun games and ways to test your understanding of Latin.
Below are some links that I find particularly helpful. If you find some more--tell me and I shall add them!
Various Exercises -- this site lets you choose exactly what kind of practice you want!
- Declining Practice -- this website will provide you a word. After you decline it, it will check your answers for you!
- Noun Endings -- quiz for declensions 1-3
- Noun Endings -- quiz for declensions 1-5, but without neuter
- edonnelly -- this site has more declining/conjugating practice
- Aeneid Intro Quiz -- how many words from the opening 11 lines can you get?
- Glossary of Rhetorical terms for the study of figurative language
- Official AP Latin Website at Collegeboard if you want a description of the test or practice questions or their other confusing documents
- Online Speaking Course -- want to learn some conversational Latin? This is basically an online book