We encourage students to view 25 minutes as half sessions and 50 minutes as full sessions, and recommend that students choose full sessions as often as possible. It takes time to do a thorough review and discussion of a draft, and more often than not, the discussion opens further areas for revision than the student anticipated. In online sessions, factor in time for getting situated with the technology, and for communicating remotely.
We find half sessions (25 minutes) to be more productive for shorter writing projects, or for students with a focused set of questions. Occasionally, a student who is developing a draft may find it helpful to schedule two half-session visits in the same week.