It is important to have a general understanding of children and of child development so you can plan your lessons accordingly.
It is a good idea to have at least a basic knowledge of the language in the country in which you're teaching, since the children may be quite young and have a low level of English.
It is important to try and only use English the entire time in the classroom with the children. If they don't understand something you say, show them. Demonstrate as much as possible and remember to use many games, songs, and activities to get them moving.
Never force the children to speak. They should enjoy the lessons and not feel stressed about going to English class. The best way to get them to speak is to show them a picture and to say something like 'Is this a bird, or a cat?' and try to use a word that they already know. They usually want to speak it then.
Benefits of Foreign Language for Young Children
Foreign Languages for Toddlers
Foreign language for babies:
Familiarizes babies with the rhythm of other languages.
Stimulates the part of the brain that processes language, with proven benefits for development of language.
Provides fun way for babies and parents to bond, as they watch and listen for new words together.
They begin to pick up the vocabulary and use it in everyday speech.
Toddlers realize every English word has an equivalent in another language, which fosters greater cognitive abilities.
They develop a better accent and think foreign language learning is fun!