I totally disagree with statement number 1. Most children enjoy singing songs because it is a change from the routine of the class. The use of songs in a class is a great opportunity to practice pupils’ listening skills and pronunciation. They also learn new vocabulary, expressions and grammar structures. Yet, the most important thing about singing songs in class is the fact that it is fun!
As for the second statement, I agree with the first part but not necessarily with the second one. I think classroom routines are important for children, especially when you start the lesson, but I think it’s also important to surprise children with new activities, not just songs.
Finally, early finishers must always have something else to do, otherwise they will probably start messing around. So the answer is yes, teachers must have extra activities ready for those students who finish early.