Interactive websites engage students by providing information and resources along with practice, simulations, and other learning activities. They can be highly interactive, content-rich simulations such as the Frog Guts (subscription-based) simulation and the Leonardo's Workshop games. Or, traditional drill and practice like Funbrain or book quizzes like Book Adventure.
Some people think of interactive games as "low level." However, it depends on how they are used. Are students making a good use of their time? Are the activities realistic, yet challenging? Can you use the games to promote learning in another area? Can you write about the activities?