Besides the e-tutoring website, NVCC offers a couple of options for on-campus tutoring, all of which are free and allow walk-ins.
The first option is the Writing Center. Located in Ekstrom 502, it is open from 9-2:30 Monday and Wednesday, 9-4 on Tuesday and 11-4 on Thursday. To get the most out of your visit to the Writing Center, make sure you bring your assignment and a rough draft with you. Call 575-8153 if you need to talk with them, but no appointment is required!
The second option is the Math Lab. The Math Lab is in Ekstrom 302, and is open from 9:30-7 Monday and Tuesday, 9:30-5:30 Wednesday and Thursday, and 9:30-1:30 Friday and Saturday. No appointment is required, and the Math Lab tutors for all math classes. A current student ID card is required (which you can get at the info desk, 5th floor of Kinney).
The third option is the Science Exploration Center (SEC). The SEC divides its time for specific classes, so visit their webpage to see the detailed schedule.