Good afternoon, Professor [Last Name],
My name is [First Name], and I'm in your [Course Name] class, section [number]. I'm writing because I'm concerned about my scores on the last two assignments and want to make sure I'm on track to finish the course well.
I've reviewed your feedback, and I think I'm struggling most with [specific area]. I tried [something specific you did], which helped a little, but I'm still not confident I understand [specific concept].
Would you have time for a short meeting or office hours this week? I want to understand what to do differently before the next assignment.
Thank you for your time.
[First and Last Name]
[Course and section]