Complex sentence: Students need to be helped by teachers to separate themselves from unconditional acceptance of the conditions of their own existence and once this separation is achieved, then students may be prepared for critical re-entry into an examination of everyday life.
Split into simpler sentences: Students need to be helped by teachers to separate themselves from unconditional acceptance of the conditions of their own existence. Once this separation is achieved, then students may be prepared for critical re-entry into an examination of everyday life.