Hello students! Today we're learning about Wechselpräpositionen. These German prepositions can express both movement (where to?) and location (where?). When indicating movement, answering 'where to?', we use the Accusative case. For example: 'Ich gehe in das Kino' (I am going into the cinema). But for a fixed location, answering 'where?', we choose the Dative case. Like: 'Ich bin in dem Kino' (I am in the cinema). The key is simple: movement means Accusative, location means Dative. Practice makes perfect!