How many senses do we have?

How many senses do we have?

Most people reply that we have five senses vision, smell, taste, hearing and touch. Why stop there? How come most people don’t list any others? When I have worked in schools with students in year 1 or 2, they can think of many more. Young children have told me things...
Proving it: Validation

Proving it: Validation

Validation is a vital concept when it comes to proving what things do.  It is a term commonly used by engineers, scientist, physicians and other people working in evidence based professions.  I usually need to explain how I have validated a new method or tool to my...