Blackboard is one of the most widely used grading application for K-12 Education. They have various products that all work in sync.

Good Features:

• Assignments can be automatically graded
• Points can be directly added to the grade database from grader
• Quizzes can be taken on the platform
• Tests can be automatically generated and unique to reduce academic dishonesty
• Work offline
• Manage grades via spreadsheet view
• Adding comments to grades
• Grades can be exported to a spreadsheet
• New user defined columns

Bad Features:

• Needs native application to have decent style on mobile application.
• Difficult for teachers to manipulate data in bulk.
• No style options for pages.

Missing Features:

• Cannot have multiple files open
• No sub-assignment level score management
• No student grade prediction report
• No graphical curve setting interface
• No team grade submission