These parochial schools, like the big-city parishes around them, tended to be ethnically homogeneous; a German child would not be sent to an Irish school, nor vice versa, nor a Lithuanian pupil to either. Instruction in the language of the old country was common. In the third period (1910–1945), Catholic education was modernized and modeled after the public school systems, and ethnicity was deemphasized in many areas.