INVOLVING HIGH SCHOOL STUDENTS IN CONSTRUCTING AND USING DEVICES FOR AUTOMATION OF CHEMISTRY LABORATORY

摘要

Computerized systems which include data loggers and sensors have been introduced recently in high school chemistry laboratories. The systems provide automation of collecting, processing, and communicating data, however hands-on manipulations are performed manually. This paper proposes additional automation of basic manual laboratory operations and construction and use of two devices, developed in our study: an automatic titrator, and a computer controlled dispenser. We present results of pilot implementation of the proposed approach in high school chemistry laboratory classes. As found, the use of the automation devices enabled to save time needed for performing laboratory work and devote it to inquiry activities. The automation devices increased accuracy and precision of the measurements. The students participated in the study noted that experiments in the proposed automated environment required less time, were more accurate, convenient and safety. They appreciated the opportunity to use advanced technology and have more time for inquiry activities.