New To San Marcos CISD Students that were not enrolled at any San Marcos CISD school during the prior school year. The link to begin the process is https://www.smcisd.net/. Step-by-step instructions are available as a PDF on the district web site at www.smcisd.net in the “Parent” folder.   Returning Student If your child was enrolled on the last day … Continue reading San Marcos CISD Back To School Information