All the kids will be different. What I recommend is using a grammar book and going through it to see what they need to work on.
I used one page each lesson with middle schoolers and gave them a minute to do the page. This will show if they need more work on it. The first few minute tests they have to get used to the idea of skimming and stuff so it might take time to get used to it.
They finish the page: they know the material
They don’t finish but they do a decent amount: review
They get it all wrong or don’t do anything: reteach
https://www.amazon.com/Grammar-Grades-Wingate-Carson-Dellosa-Publishing/dp/1483805069
This is the book I used for middle school in Korea but I’m sure it would work with high school too.