Northwood's E-Hall Pass system is likely a specific tool or software used by Northwood High School or a similar educational institution for managing hall passes electronically. Understanding it further would typically require accessing information directly from Northwood High School or its official website, contacting the school administration or IT department, or referring to any documentation or guidelines provided by the school regarding the use of their E-Hall Pass system. Additionally, if there are any educational forums or communities where teachers or administrators discuss such tools, you might find insights there as well.