You can use this blog particularly for teaching techniques and material
http://kidschessworld.com/level-1/
Chess is Child's Play: Teaching Techniques That Work
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For parents who wants to teach chess to their kids, it seems this is a nice book as a material.
http://www.amazon.com/Chess-Childs-Play-Teaching-Techniques/product-reviews/193627731X/ref=cm_cr_pr_btm_link_next_4?ie=UTF8&showViewpoints=1&sortBy=recent&reviewerType=all_reviews&formatType=all_formats&filterByStar=all_stars&pageNumber=4