Math Leaders of the 20th Century
Greg Tang is known around the world in math education. He is also a world renown author.
This Ted Talk was recorded right here in NH.
Children's books by Greg Tang:
Math For All Seasons by Greg Tang for Grade 1 https://youtu.be/JinEG7NhBtk
The Best of Times by Greg Tang for Grades 2 & 3 https://youtu.be/DKD9KEmZYso
Math Potatoes by Greg Tang for Grades K-4 https://youtu.be/qnitfOhqjYU
Math Fables by Greg Tang for Kindergarteners https://youtu.be/HU7khALT_fQ
Christina Tondevold is another well-known as the recovering traditionalist. She is known more in the K-5 math world. I have taking many of her classes.
This is a link to her site. She offers free resources from time to time.
https://www.therecoveringtraditionalist.com/