While studying the lessons, for each set of new words that you are studying you are able to do exercises via the "Start learning" button, like multiple choice questions, type what you hear, or translate from/into Romanian. If you whish that the order of these exercises be randomized (advanced and more complicated), please set this value to "On", otherwise this field should be set to Off (easier). After changing this value you will need to log-out and log back in for it to be applicable.