This article describes some of the results of a research that is mapping the use of the Internet and electronic materials in Chemistry teaching at grammar schools in the Czech Republic. The research was made in 2008 – 2009 at the Faculty of Science of Palacky University in Olomouc. The main aim was to answer the question "What is the extent of the use of the Internet and electronic materials available on it in activities related to teaching Chemistry at grammar schools in the Czech Republic?" and, through this research, to acquire necessary information for preparation own chemical educational portal. It was a quantitative descriptive research; the research method was a questionnaire. The random sample included 50 Chemistry teachers from 50 different grammar schools in the Czech Republic (from total number of 368 grammar schools). Most of the teachers used in connection with teaching Chemistry the Internet and many different electronic materials; they used mostly free materials rather than paid and visited some web pages at least once a week. The vast majority used programs and services enabling basic work with the materials, chemical graphic programs were used just by a half of the respondents.