I do not understand how you can suddenly introduce arabic words into the lesson, without first showing the word with its explanatory drawing/picture/translation. How can I know which signs to choose for "chicken" or "cold" or whatever, without the word having been introduced??
When I saw a vocab word for the first time, it was highlighted in orange, and when I ran my mouse over it it said the word in English. I too was kind of confused when they were first introduced, but I began to realize when a new word was introduced. Unfortunately, if you happen to miss the first time a word is introduced, you're pretty much screwed. It would be cool if they added a little thing in each lesson that you can click that has the list of vocabulary words.