I think that is a terrific approach - and it is true!
It is important to explore and study this material at all levels.
And as Walter Alvarez reminds us, it is also true that the stardust was mixed into more complex compounds here on earth. We are made from the carbon and oxygen made in stars - and the bio-molecules mostly formed on earth. We are stardust and we are earthlings.
One of the many things I have learned through IBHA members is how long the Montessori preschool curriculum has included key aspects of Big History. For example, Michael Duffy has been a Montessori classroom teacher and teacher trainer for almost 25 years. He co-authored the book "Children of the Universe: Cosmic Education in the Montessori Elementary Classroom," an explanation of Maria Montessori's program of Cosmic Education, the elementary equivalent of Big History. James Dunbar has a wonderful series of books for children (and adults!), called The Universe Verse. Jennifer Morgan wrote a Universe Story Trilogy -- Born With a Bang, From Lava to Life, Mammals Who Morph -- which is used in classrooms around the world. www.universestories.com.