The Individual Knowledge Assessment of Number (IKAN) can be used to determine a student's stages on the knowledge domains.  There are four versions of the IKAN, and each is available in two formats.  The Flash versions allow you to choose to start the assessment at a particular part.  The mp4 versions are video files which you can download and use offline.  Both versions now include audio.  For the Flash versions you will need to unmute the audio before starting the assessment.

Instructions for using IKAN (PDF, 361KB)
IKAN student recording sheet (PDF, 54KB)
IKAN answer sheet (PDF, 36KB)
IKAN question and answer sheet (PDF, 58KB)

IKAN 1 (Flash)     IKAN 1 (mp4, 4.1MB)
IKAN 2 (Flash)     IKAN 2 (mp4, 3.3MB)
IKAN 3 (Flash)     IKAN 3 (mp4, 3.4MB)
IKAN 4 (Flash)     IKAN 4 (mp4, 2.0MB)

Older versions of IKAN are also still available.