My Personal Research Journey

The topic I chose to research is "How important is teaching preschoolers about culture diversity in the  classroom.?"  The reason I chose this topic is becasue a lot of preschool teachers does not include lessons or activities that reinterate culture in their classrooms.  Many head start centers that I have observed in my community, do not incorporate an enviorment that provide diversity.  Classrooms should provide diversity through instructions, activities, and displays, to teach children about other cultures standards of living.  Does anyone have any suggestions about my topic, or any resource information that would helpful, if so please share the information with me.  I am open for any suggestions.