North Carolina
Study of Regions (selected especially for Elementary schools, but some are useful for K-12)
N.C. Ancient History Archaelogists 'Virtual Museum' - http://ancientnc.web.unc.edu/
'AncientNC is a new virtual museum on North Carolina archaeology and the ancient history (15,000 years) of the state’s American Indian peoples. North Carolina is home to 80,000 American Indians, the largest population east of the Mississippi River.
More About It - https://www.unc.edu/posts/2019/11/21/archaeologists-open-virtual-museum-of-ancient-nc-history-online/
Brittanica School for Middle School (found on NCWiseOwl.org) has three mentions of Regions on the page - https://school.eb.com/levels/middle/article/North-Carolina/276124
NC Pedia - https://www.ncpedia.org/geography/regions
Enchanted Learning - http://www.enchantedlearning.com/usa/states/northcarolina/
National Geographic Kids - https://kids.nationalgeographic.com/explore/states/north-carolina/#north-carolina-seashore.jpg
Pinterest - https://www.pinterest.com/pin/59391288809127942/
Teachers Pay Teachers - https://www.teacherspayteachers.com/Browse/Search:north%20carolina%20regions
Art Related Lesson - https://learn.ncartmuseum.org/lesson-plans/three-regions-of-north-carolina/
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The following do not mention of Regions directly...
...but found on NCWiseOwl - http://www.ncwiseowl.org/subject/nc.htm
Brittanica School for Elementary School - https://school.eb.com/levels/elementary/article/North-Carolina/345511
...but map resources - https://web.lib.unc.edu/nc-maps/k-12.php
...but kid oriented/graphic - https://www.mrnussbaum.com/united-states/north_carolina/
...but nice N.C. maps - https://geology.com/state-map/north-carolina.shtml