Developmentally appropriate content matches learners' maturity, prior knowledge, abilities, and readiness for learning.

• Political acceptability, administrative uniformity, and subject isolation ignore learners' readiness.

Relevance ensures that curriculum content connects with learners' needs, real-life situations, educational goals, and future responsibilities.

• Uniformity, complexity, and exclusiveness do not address whether knowledge is useful to learners.

Content validity concerns whether the selected material is accurate and adequately represents the knowledge, skills, or competencies intended to be learned.

• Being easy for every student, coming from one textbook, or being limited to factual recall does not make content accurate and aligned.

Content should be relevant to educational objectives, appropriate to learners' developmental levels, socially meaningful, and suitable for the available resources.

• Textbook popularity, number of chapters, or difficulty alone ignores whether content serves objectives and learners.

Learner-centered design prioritizes the learner's interests, developmental characteristics, needs, and experiences when selecting and organizing learning.

• Discipline-centered, traditional subject, and examination-centered designs focus on content or tests rather than the learner.

The null curriculum refers to what is omitted from teaching, which can influence what learners are able to know and understand.

• Subjects taught successfully, after-school activities, and an approved national curriculum do not describe what is left out.

The hidden curriculum includes implicit lessons communicated through school routines, relationships, rules, institutional culture, and expectations.

• Officially prescribed chapters and the exam syllabus belong to the formal curriculum, while topics left out of exams relate more to the null curriculum.

A core curriculum provides essential common learning experiences considered important for all learners, although its exact scope varies by educational system.

• Optional recreation, a single-profession curriculum, or an unplanned collection of topics does not give all learners a common essential foundation.

Activity-centered curriculum emphasizes learning through purposeful activities, participation, exploration, and practical experiences.

• Subject-, examination-, and textbook-centered curricula focus on content, tests, or books rather than purposeful tasks.

Broad-field curriculum combines related subjects into larger areas, such as combining history, geography, and civics within social studies.

• Dividing subjects into narrower units or removing content does the opposite of combining subjects into broader fields.

An integrated curriculum connects concepts and skills across subjects to develop a more coherent understanding of related themes or problems.

• A hidden curriculum is unintended learning, a null curriculum is what is left out, and extra-curricular activities lie outside the formal curriculum.

Subject-centered curriculum organizes knowledge into distinct academic disciplines or subjects.

• Activity-, problem-, and experience-centered curricula organize learning around activities, problems, or experiences instead of separate subjects.

Learner-centered curriculum gives substantial attention to students' needs, interests, developmental levels, and active participation in learning.

• Subject-centered, examination-centered, and teacher-dominated curricula focus on content, tests, or teacher control rather than the learner.

Philosophy clarifies educational aims, values, the nature of knowledge, and the kind of individual and society education should promote.

• School buildings, attendance registers, and furniture costs are administrative matters, not questions of educational purpose.

The psychological foundation uses knowledge of learning, cognition, motivation, maturation, and individual differences to guide curriculum decisions.

• Economic, political, and historical foundations deal with resources, power, and past developments rather than learner development.

The sociological foundation considers social needs, cultural values, community expectations, social institutions, and changes affecting educational purposes.

• The philosophical foundation deals with aims and values, the psychological with learners, and the historical with past educational developments.

The Saylor-Alexander approach considers educational goals, curriculum design, implementation, and evaluation within an organized planning framework.

• Memorizing textbook chapters, giving exams before needs assessment, or selecting teachers without planning are not features of this planning model.

Wheeler presented curriculum development as a cyclical process in which evaluation and feedback can lead to revision of objectives and other curriculum elements.

• Eliminating evaluation or objectives, or relying only on textbooks, contradicts Wheeler's cyclical, feedback-based model.

Taba's model begins with diagnosis of needs and proceeds through objectives, content selection, content organization, learning experiences, and evaluation.

• Tyler's model starts with objectives rather than diagnosis of needs, while Wheeler's and Saylor-Alexander's models are different frameworks.

Tyler's four fundamental questions concern educational objectives, learning experiences, organization of those experiences, and evaluation of outcomes.

• The other sequences put textbooks, examinations, or administration ahead of objectives, which reverses Tyler's logic.

Taba advocated a grassroots approach in which teachers participate actively in developing curriculum, beginning with diagnosis of learners' needs.

• Her approach is inductive and bottom-up, unlike centralized, rigid, or purely examination-driven approaches.

Ralph Tyler's model begins with educational objectives, followed by selection and organization of learning experiences and evaluation of their effectiveness.

• Taba stresses teacher-led, needs-based development, Dewey is linked with experience-based education, and Piaget with cognitive development.

Curriculum development begins by identifying learners' needs, societal demands, and educational aims before selecting content and learning experiences.

• Selecting textbooks, preparing the exam schedule, and appointing teachers come later, once needs and objectives are clear.

A broad definition of curriculum includes planned learning experiences, educational objectives, content, teaching methods, and assessment rather than only textbooks or subjects.

• A list of textbooks, a schedule of periods, or exam questions covers only narrow parts of the curriculum, not the whole planned set of learning experiences.