Navigate to the individual assessment page that you want to grade by clicking on the assessment card or by clicking on the assessment name in the assessments table view.
To begin grading click on a student cell to display the grading options available.
After adding the overall score based on the assessment type (see this article for more information), click the "standards" tab.
This will let you assess the student's standard proficiency for that specific assessment. By hovering over the standard number, you will see a description of the standard.
You can mark the student as having met the standard, being under-level or not having met the standard.
Once you're done, click the on next student cell to assess their standards proficiency.
When you've completed all assessments, use the back arrow at the top left of the screen to return to the Markboard home page.