Even in today’s digital age, chalk is still a common instrument for communication and artistic expression. Teachers use it to write out lessons. Kids use sidewalks and chalk to let their imaginations run wild. On this week's Cityscape, we’re exploring chalk as a powerful tool for communication and self-expression. The show includes:

An interview with a sidewalk artist.
A look at a program in Northern Manhattan that uses chalk art to spread a message about living a healthy lifestyle.
A look at why doctors on Ellis Island put chalk marks on immigrants they deemed ill.

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