The amount of learning likely to occur
Expository is one of the teaching methodologies which are used in science sector. This type of teaching is where the teacher is the one to direct teaching and offer all what are required in the subject. Here the amount of learning which is likely to occur is slightly higher because students are able to know what they do not know. Actually this is one of the best methods of providing knowledge to students. Guided inquiry is another type of teaching which uses constructivist principle. Here the amount of learning that takes place is not bad because students are required to answer questions meaning that they will discover more in the course of solving their problems. When we come to free discovery, here the amount of learning which might take place is slightly lower as compared to other methods because the students explores by their own. It is out of free wish which is not effective to most students, (Martin, 2008).
The amount of prescribed science content likely to be learned
By the look of things, the above three methods of teaching are all effective only in relation to the subject matter of what is expected by the curriculum. In respect to science content the latter two that is the free discovery and guide inquiry are not effective. In this case the most effective method to be used is the expository where the teacher becomes part of teach thus showing students what need to be done so as to know more about their study. In most cases some say that guided inquiry yields better results but research has shown that expository is the best in relation to science matters, (Martin, 2008).
Martin, D.J. (2008). Elementary science methods: a constructivist approach: Cengage Learning