Importance of the Public Elementary School.—Of the various schools, it is only the public elementary school with which we need concern ourselves in this book. The State compels no one to attend the higher school or the university. The children of the lower classes of the population, whose relatives are not in a position to provide instruction for them in their own homes, are all sent to the public elementary school. Now, since in a manufacturing town nearly three-fourths of all the children belong to the lower classes, since for this reason, of the children attending the public elementary schools, the enormous majority belong to the proletariat, since,............