Firstly, it is important to understand the value systems of indigenous people.
Then in your teaching start by looking at their stories with your children. Read their creation myths. If you are teaching through play experiences have resources which support understanding of indigenous people. such as artwork provocations, music etc. Have children explore ways of being such as hunting and the nomadic lifestyle if appropriate. If you have indigenous families in your class then ask them to come and talk about their traditions. Find out the history of the land your centre is situated on going right back to its use by indigenous people, even if it is just as a place they travelled through. Research research research all of the above and do the simpler ideas first. Take your time to introduce new things
try to identify with the fetus before birth and imagine its understanding of the parents and G-d (if you are religious), and try to recognize the same experience in the children with whom you will work.