You must ensure that the language you use with children is adapted to suit the situation you are dealing with. If you are trying to convey something important to a child it should be done in an area without distractions where if it is on a more social basis e.g. in the playground at break time you can be less formal and use that time to build relationships with the child, whilst maintaining professionalism. Communication with a child or an adult are very similar, be polite, respectful, show interest and maintain good eye contact. You may use different tones in your voice, simpler vocabulary and shorter sentences, when communicating with a child rather than an adult. The relationship you have in school must remain formal, you as the carer they as the pupil. It is also important to be very clear when communicating with a child so there is no room for misunderstandings. You can always check their understanding by asking them to repeat back any instructions. You must also adjust your vocabulary to suit the age of the child, to aid their understanding. Physical contact with children should be avoided as much as possible although young children may want you to hold their hand. It would be inappropriate to push them away in such circumstances.
Communication with adults can be through electronic means such as telephone or email, which you would never do with a child. No matter who you are communicating with it is always important to maintain eye contact, stay polite, and allow them to speak and to listen.