RT Journal Article SR Electronic A1 MARKOVÁ, Iveta T1 EVALUATION OF DEMONSTRATION EXPERIMENT IN TEACHING THE SUBJECT DANGEROUS SUBSTANCES JF Trends in education YR 2012 VO 5 IS 1 SP 488 OP 491 UL https://tvv-journal.upol.cz/en/artkey/tvv-201201-0106.php AB Demonstration experiment is a good didactic tool for teaching technical subjects. The obtained data from the experiment are scanned mathematical software then evaluated. The paper deals with the presentation of the demonstration evaluation trial - monitoring the effectiveness of gaseous fire extinguishing agents in the subject of hazardous substances in the study 8.3 Security Services.