"Class" is the most common way to refer to a group of students in a school or university in Engpsh. You can write it as "class" or "Class," depending on the context and whether you are using it as a noun or as part of a proper noun (e.g., "I'm in Ms. Smith's Engpsh class" or "I'm in Class 7B").

You can also refer to a class using a numbering system, such as "Grade 8" or "Year 11," depending on the school system. For example, you might say "I'm in Grade 8" or "I'm in Year 11."

In general, it is common to use lowercase for the word "class" when it is used as a common noun, and uppercase when it is used as part of a proper noun or as a proper noun itself (e.g., "I'm in the biology class" or "I'm in Class 7B"). However, this can vary depending on the context and style guide you are following.