Essentialism mainly emphasizes:

The correct answer is Abstract ideas. Essentialism mainly emphasizes abstract ideas, fundamental knowledge, and essential skills that are considered necessary for all educated individuals. Essentialist teachers believe in transmitting a core body of knowledge and traditional academic subjects, focusing on intellectual discipline and mental training. While not as extreme as Perennialism in its focus on timeless truths, Essentialism still prioritizes foundational, often abstract, concepts in subjects like mathematics, science, history, and language arts, believing these form the essential cultural literacy required for students to function effectively in society. The curriculum is typically rigorous and subject-centered.

• Practical education (B) is more aligned with Progressivism, which prioritizes hands-on learning and real-world problem-solving. Essentialism focuses more on foundational academic knowledge.
• Theoretical concepts (C) are certainly part of Essentialism, but 'abstract ideas' better conveys the fundamental, often conceptual, nature of the core knowledge that essentialists prioritize across various subjects.
• Methods (D) are important for any teaching philosophy, but 'abstract ideas' describes the primary *content* emphasis of Essentialism, which is the key distinction here. Essentialist methods often involve direct instruction, lectures, and drills to ensure mastery of core knowledge.