- View more resources from this publisherNational Physical Laboratory (NPL)
How long is a piece of string?
Four fascinating insights into the world of measurement, especially useful for investigative science at key stages 2 and 3.
- Measurement in action
- Collecting and recording evidence, data and information
- Presenting results to others
- Knot problems
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.