The Student/Parent Portal Access page allows you to create access codes for parents/guardians en masse, according to the groups you have set up in Schoolrunner. Find the Student/Parent Portal Access page via the Configure page, under the "People" subsection.
After you select one or more groups from the "Student Group" dropdown, you'll be able to download .pdf files that can be distributed to p/g of the kids in your selected group(s). Pages will be collated by group, then by student name.
If you want to print files for only p/g, make sure the toggles are set to No/No/Yes. You can also include student login instructions for all students (Yes/Yes/Yes) or for only students who don't yet have credentials (No/Yes/Yes).