nothing
they walked
It would depend on the country but generally yes.
There are many various opinions on this. Technically it should be 1930's but so many writers now use 1930s that it is becoming widely accepted. You can choose which form to use but try to stay consistent.
They moved from the great plains
When you get your schedule, it should be on the back.
There are many virtual classrooms available in the internet. Many of you may not know what it is exactly. Information about virtual classrooms can then be found at www.virtualclassrooms.info/
a fee paying school was better than a free school
Ribosomes in a cell can be compared to classrooms in a school. Just as classrooms assemble to form different subjects, ribosomes assemble to synthesize proteins. Additionally, like how classrooms are responsible for educating students, ribosomes are responsible for producing proteins that carry out various functions in the cell.
In one of her classrooms after lunch.
An empty school is like a ghost town, with echoing hallways and silent classrooms.
nothing
they walked
no
The area in a school where all the eighth grade classrooms are.
normal
You could put boxes in the classrooms and gym.