Essentialism focuses on teaching core academic subjects thoroughly. It believes students should learn fundamental knowledge and skills, especially in basic subjects like reading, writing and arithmetic. Teachers are responsible for transmitting important cultural knowledge to students through direct instruction techniques like lecture and memorization. Students are expected to be passive learners who master the material provided by their teachers. Proponents of essentialism like William Bagley and E.D. Hirsch argue this approach prepares students for life by teaching them essential knowledge and skills.