Officials in Texas are set to vote Tuesday on a controversial new public school curriculum that incorporates Christian lessons from the Bible as early as kindergarten while putting less focus on other faiths.

The Texas State Board of Education has given initial approval to a Bible-infused curriculum that would be optional for public schools to adopt for lessons from kindergarten through fifth grade.

The state-developed instructional materials, known as Bluebonnet Learning, have been criticized for improperly bringing Christianity into the classroom.