Free computer classes are available for seniors online at various websites, as well as through many community colleges, senior centers and community education programs. A formal classroom setting can be useful for those with limited knowledge of computers and the Internet, while online classes may be appropriate for seniors who have already gained basic computing skills.
The advantage of formal classroom courses aimed at seniors is that they go at a slow pace and start with the basics while explaining how computers work and basic terminology. In-person classes, as opposed to virtual online courses, also allow for hands-on learning and one-on-one attention from an instructor.
Online resources are more plentiful and many of them are free, but most of them assume the user already has some basic understanding of computers. The advantage of online courses is that they can help a senior develop skills beyond the basics. Some websites, such as the Microsoft Accessibility website, can assist seniors with visual impairments or other age-related conditions that make learning computer skills difficult.
Additionally, YouTube.com hosts many video tutorials aimed at seniors. These videos can be found by searching for "computer skills for seniors" or similar phrases in the YouTube.com search engine.