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KeyMaths3 UK

KeyMaths3 is a standardised assessment measure of mathematical concepts and skills. It provides assessments in basic concepts (conceptual knowledge), operations (computational skills) and applications (problem-solving). Each of these sections is further divided into subtests.

Age range

6–16 years, 11 months

Who can use it?

Teachers of the Deaf or speech and language therapists with a specialism in Special Educational Needs, specific learning difficulties or another relevant field. Users must hold a postgraduate diploma or Master’s degree.

How is it used?

Participants are asked to carry out tasks which involve conceptual knowledge, computational skills, and problem-solving. These tasks involve identification of problems, calculation and writing. The test should be administered individually and takes 30-90 minutes. 

What can it tell us?

The test provides scaled scores, standard scores, and percentiles. This means that the child’s score can be compared with that of hearing children of their age and grade.


  • Is well standardised.
  • Helps with intervention planning.


  • Test may be too long for some.

Is there a cost?


Where can I access it?