In Canada, as in many countries, teachers are being encouraged to integrate information and communication technologies (ICT) such as the Internet into the curriculum. A study conducted in Canada in 1999-2002 examined Internet use in schools through interviews with technology leaders, through surveys of teachers and principals, and through case study investigations of three school districts, each in a different province of Canada. The case study data from the three districts was analyzed, using the NVivo software program, to address three main questions: (1) To what extent was teachers' use of the Internet consistent with “best practice,” as described by Moersch (1999)? (2) What types of support systems appeared to be essential for effective Internet use in classrooms to occur? (3) What was the role of the teacher-librarian in contributing to effective Internet use in classrooms? The study showed that teachers were integrating the Internet into their teaching, but had not yet achieved “best practice,” and that teacher-librarians were influential in supporting teachers’ progress towards “best practice” in the use of the Internet in instruction.