Refrain from touching the child unless invited by him in some form or another. (We do not use the child’s natural affection to answer our own emotional needs, but rather to be there for him or her.)
Do not speak ill of the child.
Concentrate on strengthening and helping the development of what is positive in the child.
Actively prepare an environment where the child may constructively work with materials that have a purpose.
Be ever ready to answer the child’s call (verbal or otherwise) for help.
Respect the child who makes a mistake and can self-correct. Re-teach by showing rather than shaming, but firmly and immediately stop any action that endangers the child, other people or the environment.
Respect the child who chooses to rest or watch others who are working.
Help those who are in search of activity and cannot find it. Tirelessly offer kind invitations to work.
Make your presence felt to the child who searches for something to do and step back from the child who has found his work.
Always treat the child with good manners and the best you have within yourself and at your disposal.
Source: Age of Montessori subscription mail.