As part of the The Agile Coach - What is Scrum playlist, there is a video on Sprint Planning Basics.
The 3-step process used at Atlassian involves:
- Backlog grooming
- Sprint planning meeting (1 hour for every week of the sprint duration)
- Creating action items
Does this resemble what your team does?

I'd score my team X X X right now for following this process. That just means like many of you our agile adoption process is iterative!
How does your team plan sprints?