Chalkboards are typically composed of slate stone. The classic color of chalkboards is green. In newer institutions, the use of dry erase boards has become common.

You Can Order Chalkboards online, there isn't any store that sells them so you have to order them.

The plural form of chalkboard is chalkboards.

Originally, chalkboards were made of slate stone and were not magnetic. Some modern chalkboards today are magnetic. Also growing in popularity is the whiteboard, some of which are also magnetic.

There is no official name for the phobia of chalkboards.

However, psychologists do recognise that the irrational fear of chalkboards, screeching chalk and fingers dragged on chalkboards do exist. They just don't have an official name.

So, for now, "Phobia of chalkboards" will suffice until a name is agreed upon in the future.