The Effect of PCK on Solving Selected Chemistry Problems
Dr. Safa A. Zaid-ElKilani, Dr. Adnan S. Doulat, Dr. Mansour A. Alwraikat

Abstract
This study examines the immediate and long term effect of using PCK approach of instruction that integrate macroscopic, symbolic and molecular representation of chemical phenomena on solving selected chemistry problems. Three groups of teachers' students had been examined in problem solving chemistry tests. The study shows that there is a significant difference between the groups who get PCK methodology course and those who do not; the results of the study also show that there are a long term effects of using such approach of instruction, there is no significant difference between the answers of group who just completed PCK methodology course, and those who get it the year before.

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