Across the country in at least a dozen states, Democrats are blocking bills that would require curriculum transparency in public schools. The teachers claim that giving parents access to their children’s learning materials online could lead to censorship and backlash against educators.

Parents are already entitled to request their child’s curriculum if they attend a public school, but there’s no requirement to post it online. Republicans in at least 12 states have introduced legislation that would require schools to post all teaching materials online, including what books, videos, and articles will be covered.