Approved by the USCCB?

Though it is true that individual Bishops have given their praise and approval to CGS, this system has not been authorized and approved by the USCCB.

"It was the judgment of the Ad Hoc Committee that because of its very nature as a Montessori program, The Catechesis of the Good Shepard does not lend itself to the possibility of a conformity review." USCCB Office for Catechism