Objects, specimens, models, and replicas can all be used for educational purposes. Objects are real, tangible items like books or medical equipment. Specimens are parts of objects that represent a whole category. Models are three-dimensional replicas that can be the same size, larger, or smaller than the actual object. Replicas are full-sized copies of objects that look, feel, and function like the real thing. While objects, specimens, and replicas can provide hands-on learning, they have limitations like storage needs, cost, and potential for damage. Models are versatile for demonstrating size, processes, structures and simulations in ways that overcome limitations of distance, time, and inaccessibility.

1. OBJECTS , SPECIMENS & MODELS