These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

QTC: A Remarkable New Material to Control Electricity

This booklet is part of the ‘Innovations in Practical Work’ series published by the Gatsby Science Enhancement Programme (SEP). QTC (Quantum Tunnelling Composite) looks rather ordinary, but this rubbery black material shows remarkable properties. When squeezed its electrical resistance drops, and this unique property opens up a huge range of domestic and commercial applications. Just as remarkable is the low cost of QTC, which means that whole class practical work is easily affordable. It is simple and safe to use, and provides an interesting context for teaching about electrical circuits, with many possibilities for open-ended investigations.

The QTC booklet contains an illustrated overview of the topic with suggestions for teachers on how to introduce the ideas in the classroom, plus student activity sheets and notes for teachers and technicians.

The downloadable resources include:
• Student activities: zip files containing the activity sheets in PDF and editable Word formats.
• PowerPoint presentations: these contain a complete set of the images used in the booklet and activity sheets.
• Video clips of the inventor of QTC, David Lussey, describing how it was developed.

The ‘Innovations in Practical Work’ publications are supported by low-cost practical resources available from Mindsets:
* SEP publications and resources from Mindsets
* Practical resources for QTC

Show health and safety information

Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.
This resource is a Category Three Materials

Lists that tag this content