Which one of the following methods of language teaching cannot be used interchangeably or integrated directly with grammar translation and contextual methods due to its strict exclusion of the native language?

A method of teaching in which a teacher and two to four pupils form a collaborative learning group where dialogues occur on the content of the text passage, creating a zone of proximal development in which reading comprehension improves, is referred to as:

A teacher divides her class into groups of five and allots them themes chosen by the learners. She asks them to collect required information, interpret it, and write a report to present to the whole class. What is this activity known as?