To determine the effects of the amount and type of information supplied by a concept definition, fourth and eighth graders were presented with one of two definitions: a "technical" definition which precisely specified all defining attributes of the concept, and a "common usage" definition from a children's dictionary which did not specify all…

An investigation was made to determine the instructional function of the professional media staff in a school. The objectives of the study were: (1) to develop a model to add the expertise of the media specialist to the teaching team; (2) to access the effect the model had on the academic achievement and self-concept of students; and (3) to…

This study examined the effects of episodic-mapping, traditional notetaking, and rereading on eighth-grade students' recall of historical text. Episodic-maps are a kind of notetaking procedure that requires students to represent ideas from a text in the form of a graphic diagram. As predicted, both episodic-mapping and traditional notetaking…

The handling of mistakes in the mathematics classroom is an area in which only little research is done so far. In mathematics education there are, in fact, several investigations about students' mistakes from a diagnostic perspective, but hardly any studies on the question how teachers react in concrete mathematics lessons. In this article…

The effects of analogical and schematic illustrations on the comprehension and retention of expository prose were compared. The population was 191 eighth-grade students at Mahomet Junior High School, Illinois; 134 students' scores were used. Subjects were assigned to two groups through the random distribution of treatment booklets that included a…