A few thoughts on Joy Hakim's history...

1) from wikipedia:
Originally Posted by wikipedia
Criticism
Hakim's treatment of pre-modern Western history and the New World colonial period in History of Us: Making Thirteen Colonies has been criticized by the president of the Textbook League, William J. Bennetta. In particular, the concept of multiculturalism, including an asserted Chinese influence on European culture in The First Americans, has been criticized by Bennetta for its lack of support by archaeological or historical records. Some older middle school aged students could find the books graded towards a lower level, and therefore frustrating.

2) from Joy Hakim's website:
Originally Posted by Joy Hakim website
A Texas teacher, using the books to teach reading to low achieving students, saw reading scores soar and was named Texas Teacher of the Year.
These books may not be geared for gifted pupils.