The principal is quoted as saying that he is unaware of any previous problems, but there have been comments left at my blog stating that Paszkiewicz has been doing this for many years.
The principal also claims that corrective action was taken--a reprimand was supposedly given back on September 25--but Paszkiewicz's classroom style doesn't appear to have changed much in later classroom recordings (I have heard some samples from September 26, 27, 29, and October 3 and 4).
The New York Times article makes it clear how bad Paszkiewicz has been--even conservative legal groups have no interest in defending him:
The article notes that the LaClairs are considering legal action.
Even some legal organizations that often champion the expression of religious beliefs are hesitant to support Mr. Paszkiewicz.
“It’s proselytizing, and the courts have been pretty clear you can’t do that,” said John W. Whitehead, president of the Rutherford Institute, a group that provides legal services in religious freedom cases. “You can’t step across the line and proselytize, and that’s what he’s done here.”
(Also see Pharyngula and Dispatches from the Culture Wars.)