A-level English Language

Hello! Well, I got my English Language coursework back today from my teacher, who marked it over the Easter holidays. I also got given a mark scheme. The boundaries are as follows:
0 - 10
11 - 20
21 - 30
31 - 40
41 - 50
51 - 60
Am I correct in believing that these represent grades? So that 51 - 60 is an A, 41 - 50 is a B, 31 - 40 is a C, 21 - 30 is a D, 11 - 20 is an E and 0 - 10 is a U?
Please can someone help me with this! Thankyou...

[Casiopea]

Well, that's how I would read it, too. But you should check with your teacher.

Welcome, Donna.

[Tdol]

If so, then what is 61-100? Is there an A+?