Log in to the Portal using your SC4 email, then look for the Service Center box as shown below. Click on College Credit Students to bring up the Service Center, then click on that.
After clicking on Service Center, it will bring you to a page that looks like this (below). Click on Grades in the second column to view the previous semester's grades..
If you're having any trouble, please call the Records Office at (810) 989-5500.