Footage from 1998 of a slate quarry at Penrhyn, showing non-traditional ways of slate cutting. The quarry once produced 120,000 tonnes of slate per year, but is now down to 16,000. It still produces half of the UK's slate exports, but a ruling by the EU has meant that they must now consider using Spanish slate to roof Welsh buildings.

This clip is from:
BBC Wales

The slate industry has changed dramatically in Wales during the 20th century. Students could compile a list of questions that look at how work and industry have changed in Wales since the Industrial Revolution. Students could be divided into groups and instructed to gather information about which types of industry are important to Wales in the 21st century.