Once you have determined a student's strategy stage using the Global Strategy Stages (GloSS) diagnostic interview and the Individual Knowledge Assessment of Number (IKAN) , you may wish to provide interventions to support student understanding. These interventions can be found here, in the Numeracy Project Books:
http://nzmaths.co.nz/numeracy-development-projects-books
Materials to accompany the interventions can be found here:
http://nzmaths.co.nz/material-masters

Intervention tables have been created to assist in determining which interventions are appropriate for each stage.



You can search for interventions/tasks here:
http://nzmaths.co.nz/resource-finder/numeracy

Modified versions of the interventions (which replace language which may be unfamiliar with familiar language) have been created by colleagues in Henry and Cobb County and they are graciously shared here.
Thanks, teachers and coaches in Cobb and Henry!