Explains laser classification and hazards. Describes the  lasers that are permitted in school and the range of relevant practical work. Also desribes common devices which use lasers and how they might be used in school. Finally, describes the classification and uses of modern, bright LEDs.

The use of concrete or steel lintels to support walls above an opening. The use of timber beams to provide similar support above an opening.

Using laser spirit levels to determine whether walls and other surfaces are truly horizontal or vertical.

Use of a high-power laser to cut plastics, rubber, wood, card and textiles under computer control as an example of CAD / CAM.