K–12 Sign In Depending on how your teacher set up your Cengage course, you might access Cengage through nglsync.cengage.com or Google Classroom. If you don't know where to access your Cengage course, ask your teacher. Sign In with NGLSyncIf enabled by your teacher, sign in to nglsync.cengage.com with your NGLSync account to access your Cengage course. Sign in with Google ClassroomIf enabled by your teacher, sign in to your Google Classroom class to access your Cengage course.