The model could facilitate curriculum research by making it possible to formulate succinctly questions that have not received enough attention from curriculum specialists. A model suggests certain questions for research simply because they are so easily framed in the model's terms. The classical model has encouraged studies of the best form for objectives and of the results of various ways of formulating objectives. The naturalistic model, because it employs different terms, suggests other questions. Justification is an important component of the naturalistic model.