Active learning and the infinitive of purpose

We use to + the base form of the verb to show why someone does something: I use flashcards to remember new words. This pattern answers the question “why?” and can be replaced by in order to: I use flashcards in order to remember new words. For a negative purpose we use in order not to: I write notes in order not to forget the dates. In a more formal style so as to / so as not to are also possible: She left early so as not to miss the bus. An active learner builds knowledge by speaking, writing and doing, while a passive learner mostly reads or listens. When the subject of both parts is the same we do not repeat it: I joined a club to practise speaking (not “to I practise”).