Below are some websites that students can access to continue their Indonesian.
Students are very familiar with this website for the online interactive activities. There is also an iPad version that has a different set of activities, even the ability to practice orally. Students can also access print activities they can complete.
Duolingo will be new to students. It is free but youwill have to create an account. ( There is premium versions but they charge). There are lots of quizzes and different activities.