The teacher knocked on the blackboard to catch our attention.
The teacher chalked out a map of Asia on the blackboard.
If you should look around at the walls, you will see a crucifix in front, just above the blackboard.
Much time has been spent, over the past century, on working out exactly what it is about the sound of fingernails on a blackboard that's so unpleasant.
We did it at last with considerable restraint, while the geometrical figures on the blackboard stared at us in wonder and the blank verse of the Meghnadvadha looked blankly on.
Think about the questions on the blackboard.
The teacher wrote on the blackboard with a piece of chalk.
I want to write on the blackboard, so I have to wipe all the words here out.
They're all going to rotate about an axis perpendicular to the blackboard, so to speak, and we're going to massage each one of them to predict their periods.
So knowing the meaning of life as encoded in a religious creed on a page or an equation on a blackboard is not the issue. A deeper, richer experience of this one life: that is the issue!
The teacher wrote down the new words on the blackboard.
You could also use a blackboard if you are working with a group of people.
The men, rugged-looking and some of them with flecks of gray in their beards, look daunted but determined as they take turns standing up before the class to read basic sentences off the blackboard.
Who's rubbed my figures off the blackboard?
She was the "Ms. S" that was written so huge on the blackboard.
When cubs are hungry, they produce a grating fingernails-on-blackboard sound, with their lips pulledback from their teeth, to encourage their mother to lie down so they can nurse.
The blackboard is in the front of the classroom.
I first want to review with you briefly what we know about circular orbits, so I wrote on the blackboard everything we know about circular orbits.
So this one is in the blackboard, so I call that positive.
The chalk rasped across the blackboard.
Unlike most professionals, I get to erase my mistakes twice a year, wash the blackboard, and start off on a whole new set of trials and the errors that come with them.
The professor wrote an equation on the blackboard.
Trying to fix the tie , he took a blackboard eraser and hammered a large tack through his tie into his chest.
OK, so I'm going to divide my blackboard into three pieces, and here I will write triple integrals.
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