Explain to the children the concept of the directions left and right and how those directions are used. You can explain how it is important to know left from right in order to get to school, the store or a friend's house.
Show the children how to tell the difference between the left and right hand. Have them make a fist with their thumbs touching and put their fingers up. Have them pull their hands apart and look for the uppercase letter "L". The hand that makes the letter "L" is the left hand.
Label items used daily with left and right. If students sit at a desk, label the left and right side of the desk to remind students of the directions. You can also label their hands with a washable, non-toxic marker, with the letters "L" and "R" to remind them which hand is the left and which is the right.
Practice the difference between left and right on a daily basis. You can practice the directions using worksheets, by playing a game or by singing a song about directions.