When students write online, many forms of person are acceptable. Here is an overview of those types of person and their typical uses.

Person
Singular
Plural
First person
“I”

Blog posts where students write their personal opinion.
we
A wiki or Google doc of class rules or positions. Make room for a dissenting opinion”– be clear about who we is. This can be a challenging because consensus is required.
Second person
“you”
Often used alongside blog posts or in instructional texts. It can make the reader more comfortable and is a style often used in videos and how-to’s. Be clear about who “you” is at the beginning. “I’m writing this for .” This is a compelling technique used by many popular bloggers who write as if the reader is a best friend.
Third person
This is used in academic writing, essays and neutral sources of information. As a frequent forms of academic writing, third person is in most writing programs.