Improvement of education depends on changes that a teacher can actually bring about inside the classroom, and each alternative offered here names one such change.

Discipline that rests on self control instead of fear allows children to question, argue and explore, which is what modern curriculum documents ask of a classroom. Teaching aids, models, charts and other equipment turn abstract matter into something that can be seen and handled, and they hold attention far better than words alone. A course of study tied to the learner's own surroundings keeps willingness to study alive instead of reducing study to memorising.

The three measures work on three different fronts, namely the climate of the class, the method of presentation and the content itself. They support one another rather than exclude one another, so a teacher who wants real improvement adopts all of them together.

All of these option is correct.