Błędnie: As an atheist, Paul didn't feel like sending his kids to a school with a cruciform in every clasroom. Poprawnie: As an atheist, Paul didn't feel like sending his kids to a school with a crucifix in every clasroom.
"Cruciform" to przymiotnik- 'krzyżowy', 'w kształcie krzyża'. 'Krucyfiks', 'krzyż' to "crucifix".