2. Curriculum: The curriculum is an abstraction of the knowledge and skills deemed important for students to learn. It simplifies a vast and complex body of knowledge into manageable units and subjects, potentially ignoring connections and interdisciplinary aspects.
3. Classroom: The classroom itself is an abstraction. It's a designated physical space that represents a learning environment, but the actual learning experiences within it are far more varied and complex than the simple designation of "classroom" suggests.
4. Teacher's role: The teacher's role is an abstraction of various complex tasks and responsibilities. It simplifies the multifaceted job of teaching – including lesson planning, assessment, mentoring, classroom management, etc. – into a single, easily understood title.
5. School bell: The school bell is an abstraction signifying the transition between different activities (classes, lunch, recess). The bell doesn't inherently dictate learning or structure; it's a purely symbolic representation of scheduled times.