A researcher is conducing a case study of three teachers within a school. Which of the following data collection procedures is the researcher most likely to take?
◦ Collect as many types of data as possible for an in-depth understanding.
◦ Spend at least four months in the classrooms collecting data.
◦ Emphasize fieldnotes and observations of the school's cultural scene.
◦ Focus on active collaboration between the researcher and teachers.