How to use Blackboards in a sentence
Northampton, Lehigh and York counties contain the most productive slate quarries in the country, and in 1908 the value of their output was $3,902,958; the Northampton and Lehigh slate is the only kind in the United States used for school blackboards.
Slate is quarried chiefly in Piscataquis county, most of it being used for roofing, but some for blackboards; in 1907 the amount quarried in Maine was valued at $236,106.
When she felt the maps and blackboards she asked, "Do men go to school?"
Weekly specials and sweets are displayed on the blackboards.
If you aren't familiar with slate tiles, the image of a slate backsplash may be calling to mind classroom blackboards in black or green.Advertisement
People that need their blackboards right away and don't have time to wait should dry them using microfiber cloths to prevent lint deposits.
There are several cleaning methods for blackboards, also called chalkboards, that will maintain their rich color, smooth appearance and quality writing surface.
Commercial cleaners and special cleaning cloths made specifically for blackboards do an excellent job of cleaning and caring for chalkboards.
Making a cleaning solution for blackboards is as simple as mixing white vinegar into water.
Once a week, usually on Friday, someone was given the job of washing the blackboards after everything was erased.Advertisement
This simple method will keep your classroom blackboards looking like new.
Use a chalkboard cloth made specifically for cleaning blackboards.