The company that submitted this textbook is headed by an ex member of the BOE who has a history of a known agenda. Because of her and others that were on the board at the same time, the ruling that schools had to use their recommended textbooks was changed to it becomes only a recommended book. She still has friends on the board but luckily they are now a minority. Education groups are now very involved in vetting all proposed material and raising questions when facts are inaccurate and slanted .
That being said my DDs received an excellent public education in the state of Texas even considering the textbooks. If there were inaccuracies, the teachers tended to point them out and have class discussions. In history, there tends to be many perspectives and actually students learn more when they are all discussed.