After the completion of the four week Child Welfare CORE Training, new workers are expected to complete the mandatory specialized workshops within the eighteen months following completion of CORE. New workers will be given a written schedule of their enrollment in the appropriate Level I Mandatory Specialized Training workshops when they complete CORE. Below is the list of requirements by track for Level I training. By clicking on the class number you will be taken to that class page where you can access descriptions and announcements for that course. COREs graduating prior to July 1, 2005 have different requirements than those graduating after July 1, 2005.