He designed the Termite using chalk on a basement floor.

Using chalk as an example, you will observe a weight loss as a function of time.

Use your feet, chalk or painting to create the fields, depending on the surface.

Using chalk and a blackboard, Tom dashed off a simple example.

There were no books here, the children using slate boards and chalk for their work.

Using chalk had no particular advantages over charcoal, pencil, blood, or oil paint.

The climber can not use chalk to dry their hands.

I believe some of the science teachers use colored chalk, but where is there to hide at the high school?

The face is coloured using chalk and other natural dyes.

On black construction he used white chalk and brought life from the black background.