Berlitz Vocabulary Study Cards Mandarin. Take your language learning to the next level with these expertly developed study cards. Introducing the new edition of our two-sided Vocabulary Study Cards which have been redesigned for a more user-friendly look and ergonomic feel. Helping students of all ages learn, review and build confidence in their Mandarin, compiled by an experienced teacher to help you improve at your very own pace. The 1000 cards are totally portable and interactive, making them ideal for individual study or for quizzing your friends and classmates! Use the app for on-the-go learning too.