I don't think that is what you mean

Website Home Page Source: http://montessorikamloops.com/

When I was a child my mother explained the difference between "famous" and "infamous". Someone or something was "infamous" if it became "famous" for negative reasons. So, Three Mile Island, Bhopal, Chernobyl, and the Exxon Valdez are all "infamous" for their own reasons.

It appears that someone at the Montessori school is a bit confused and thinks that the "in" prefix in the word "infamous" is the same as the "in" prefix in the word "inflammable", where it means extremely.

This level of linguistic confusion is not what I am looking for at an educational institution.