From the site:
The purpose of this site is to give elementary students of Indonesian the opportunity to practise and review basic vocabulary, grammar and sentence structures as they work through their course and prepare for the examination. Each unit contains a range of exercises of various types, including:
* Multiple-choice quizzes
* Gap-fill exercises
* Matching exercises
* Short-answer questions
* Word-ordering exercises
* Sentence-ordering exercises
* CrosswordsAll the exercises are interactive, so you can check your answers and get hints and feedback as you work.