A writing slate is a piece of flat material used as a medium for writing.

In the 1800s, writing slates were made of slate, which was cheap at the time when paper was expensive. It was used to allow children to practise writing. Slate is also more durable than paper.

Writing slates, although not made of the mineral, are still used:

• SCUBA divers carry plastic slates and pencils to communicate with other divers, to record facts underwater or read pre-dive plans.
• Proprietary writing slates which protect young children and their clothes from the damage and discolouration potentially caused by paint, pencils and pens are used as toys or educational items.