These are some good techniques for teaching ESL children:

• Face the children when you are speaking.
• Speak clearly at an average to slow rate.  Do not exaggerate your words.  Speak normally.
• Avoid using idioms or confusing phrases.
• Explain things in more than one way.
• Repeat key words, phrases, and ideas.
• Use comparisons, similes, analogies, and opposites when appropriate.
• Brainstorm using a white board or chalk board or if you’re at home then a piece of computer paper works great.
• Build upon the children’s experiences.
• Use visuals and props as often as possible.
• Use culturally appropriate materials.
• Demonstrate whenever you can (act it out).
• Provide a print-rich environment.  Label objects with the name of the object written on an index card.
• Ask children questions often to determine understanding.
• Have the children role play.