We recommend that you do your review items first before learning new items. These items are timed specifically to the point in time just before you're likely to forget them, for maximum efficiency. If you do forget them, don't worry as Glossika will adjust to your learning style. Just as with learning new sentences, there are 2 different kinds of training modes: full practice and listening only. Simply select the training mode that you'd like to use. Please be aware that listening only mode, which is a lot easier, will lead to less efficient results. We can only guarantee results through full practice mode.