At some point I got the understanding that it was not too good to move around while teaching because it seems like pacing and fidgeting and can cause students to focus on your movements rather than the lesson at hand but then another subject area pointed out that it helps students to stay more focus when instructor moves around and also it can be said that the instructor is claiming the whole classroom as the whole teaching territory therefore moving around is a absolute must to keep students engaged. I guess the difference is the pace of the movements?