Withdrawal rates were 6.3 percent higher in the lecture-discussion group. The final grades achieved by A-T students were directly related to the amount of time spent in the lab. Neither method of instruction was observed to be more adapted to any grouping of students according to age or sex. The lecture-discussion group scored significantly higher on both achievement tests, males and females scored equivalently, and those over 21 scored significantly higher than those under 21. In order to compare the effectiveness of these teaching methods, all 220 students were given achievement tests in astronomy and physics at the end of the time allotted to each topic. The A-T group consisted of 144 students in two sections, and the lecture-discussion group consisted of 76 students in two sections. This combination of teaching and research experience provides the expertise and skill to clearly and accurately explain difficult scientific concepts.All students enrolling in the day sections of Physical Science 101 at Pensacola Junior College (Florida) during the spring semester of 1974 were allowed to register for either audio-tutorial (A-T) or conventional coursework. As an active research astronomer, Heckert has published over 60 research articles in respected peer reviewed astronomy journals. He is a professor of physics and astronomy at Western Carolina University and has been teaching college level physics and astronomy for over 30 years.
Heckert, the author of Understanding Radiation and Radioactivity: A Physics 101 Tutorial, earned a PhD in physics with a specialization in astronomy from the University of New Mexico in 1983. You will then be able to apply your understanding to study for your exam, to evaluate radiation hazards, or to meet whatever other need you have. This physics tutorial covers all the concepts needed for a basic understanding of radiation and radioactivity, yet it is brief enough to read in half an hour. The clearly written explanations are conceptual and stress understanding concepts rather than memorizing words or manipulating equations. The tutorial ends with a brief discussion of radioactive isotopes present in the environment. An explanation of the concept of half life will help the reader understand how long radioactive isotopes last in the environment and how radioactive dating works. A brief summary of how physicists measure radiation doses and the health effects of different radiation doses follows. This tutorial starts with an overview of the three major types of radiation: alpha, beta, and gamma radiation. Anyone who wants to intelligently understand the risks posed by radiation and radioactivity will find this tutorial useful. This tutorial is written for students from middle school through college who need help understanding the basic concepts of radiation, but it will also be useful for science teachers, other teachers, or home schoolers who need a quick refresher on the concepts of radiation. Written by a professor with a PhD in astrophysics and over 30 years experience teaching physics and astronomy, this tutorial will be useful for anyone who needs to know more about radiation.
Do you need a quick tutorial on radiation and radioactivity? Understanding Radiation and Radioactivity: A Physics 101 Tutorial clearly explains the concepts underlying radioactivity and radiation.
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