Make sure you allow one 3-hour periods of completely uninterrupted work for each morning and afternoon. Children need this work period in order to be self-sufficient and learn self-motivation. You should plan your group lessons at the beginning of the school day or at the end. It is of the utmost importance to respect the child's deep concentration during that time in order for him to learn how to self-discipline and to stay on task.
Let the child take control of his learning. The Montessori classroom is arranged in work areas according to subjects. The children buzz around this area on their own and you will have to wait until a child asks your help to show him how to use a material. Let the children move freely and spend as much time as they need in doing whatever activity attracts them. There is no limit of time spent on an individual material or activity. You can only encourage children to move around work centers in order to diversify their interest if you sense the need for it.
Do not correct your students, whatever mistake they make. On the contrary, respect their work as it is. For instance, Montessori puts more emphasis on the love for writing, spontaneity and creativity than on spelling correctly or showing perfect control of grammar. There is no homework and red marks all over the child's page. The role of the teacher is to prepare an individual plan for each child and record progress. The Montessori education stands out in the sense there are no grades and no punishments or rewards.
Teach each child at one time. The Montessori classroom looks a lot like homeschooling except that the child goes to a school and does not have the constant supervision of a parent. Be prepared to work with each and every child individually on a broad range of subjects. You should be trained to guiding the child's research and experimentation, build on his interests and his excitement for certain tasks. You will never assign tasks, dictate assignments or make judgments.
Assess the child's readiness regularly. Keep in mind his age, his ability, his interests and guide the child in a positive way. To build the child's character is as important or more important as building the child's academic skills. You should always encourage character-building activities over academics. Children learn how to do things on their own, even tasks traditionally considered too hard for them or too dangerous, such as sweeping the floor, using a hammer to hit a nail, cleaning the tables or gardening. These are important tasks necessary to give the child a love for trying, learning and self-confidence.