If a language teacher groups the words 'school, teacher, headmaster, peon' together, which type of grouping is she following?

Which principle of language teaching provides a structure for essential learning and helps the teacher know the aims and objectives of the course in advance to complete the syllabus systematically?

A teacher teaches her students questions starting with the 'Do' form (e.g., 'Do you like it?') before moving on to questions with interrogative WH-words (e.g., 'What do you like to eat?'). This instructional sequence is associated with which principle?