Figure 1. A view of the retina seen through an ophthalmoscope. In the center of the retina is the optic nerve, a circular to oval white area measuring about 2 x 1.5 mm across. From the center of the optic nerve radiate the major blood vessels of the retina.
A virtual classroom is an online classroom that allows participants to communicate with one another, view presentations or videos, interact with other participants, and engage with resources in work groups. Non-Restricting.
A classroom observation is a formal or informal observation of teaching while it is taking place in a classroom or other learning environment.lassroom observations may be called learning walks, teacher observations, walkthroughs, and many other things, and they may be conducted for shorter or longer periods of timeâfrom a few minutes to a full class period or school day.