THE SIPHON-TWO NEW LECTURE DEMONSTRATIONS

Using Lecture Demonstrations to Visualize Biological Concepts

INTRODUCTION The use of visual aids in biology has traditionally focused on laboratory activities and demonstrations (3, 6, 8, 12, 15–18). However, a limited number of authors have suggested activities suitable for lectures. Such activities reinforce the concepts taught and require less equipment, time, and expense than laboratory activities Moreover, simple demonstrations are easy for students...

Role of physics lecture demonstrations in conceptual learning

Previous research suggests that students’ prior knowledge can interfere with how they observe and remember lecture demonstrations. We measured students’ prior knowledge in introductory mechanics and electricity and magnetism at two large universities. Students were then asked to predict the outcome of lecture demonstrations. We compare students’ predictions before having seen the demonstration ...

The Parents as Teachers program: results from two demonstrations.

The Parents as Teachers (PAT) program is a parent-education program that includes home visiting and is designed to begin prenatally or at birth. Through home visits, visitors called parent educators help parents to strengthen their parenting skills and knowledge of child development and to prepare young children for school. This article describes the PAT program and reports the results of evalu...

Calcification of the carotid siphon.

CALCIFICATION of the internal carotid artery in the region of the cavernous sinus is an extremely common radiologic finding.' Although it is the only readily available laboratory criterion of cerebrovascular disease its significance has never been determined by combined clinical, radiologic, and pathologic studies. Whether the arterial changes in this region, which we shall refer to as the siph...

The need for demonstrations to test new ideas.