On Monday, President Donald Trump tweeted his support for including Bible literacy classes in public schools.

Numerous states introducing Bible Literacy classes, giving students the option of studying the Bible. Starting to make a turn back? Great!— Donald J. Trump (@realDonaldTrump) January 28, 2019

USA Today reported that Florida, Indiana, Missouri, North Dakota, Virginia and West Virginia are looking to add Bible literacy classes of some sort to “encourage public schools to offer elective classes on the Bible’s literacy and historical significance.”

Indiana’s Senate Bill 373 aims to mandate the teaching of creationism, require all schools teaching a course on religions of the world include a study of the Bible, as well as mandating schools put posters of the American Flag, state flag and motto “In God We Trust” in all classroom, and would allow students to receive elective credit for religious studies.

Critics have pointed out that such bills blur the lines separating church and state.