Online learning may not appeal to everyone; however, the sheer number of online learning sites suggests that there is at least a strong interest in convenient, portable learning options — many of which are study-at-your-own-pace. For your reference, we've selected 50 top learning sites and loosely collected them into the categories you'll find below. 

While this is not a rankings list by any means, (for that you should consult our ranking of the best online colleges) by using a variety of criteria, we've filtered in some of the most popular sites in each category.Many of these sites offer free lessons; some require payment or offer verified certification for a nominal fee. 

The world of education is constantly changing and evolving. 
In fact, one of the only constants of education is change itself. 
One of the biggest driving factors affecting the changes in education today is technology. 
Our students are part of a new generation – a generation that is constantly connected and surrounded with technology, and so it only makes sense to fully incorporate technology into our teaching practices. As educators, we are the ones who need to evolve and adapt our teaching practices in order to accommodate, foster, and expand our students’ use of technology. We need to create a learning environment that supports 21st century learning.

The solution is pretty obvious: schools need to implement digital classrooms.
Some sites offer very general non-academic lessons, others provided actual college / university curriculum course material. Whatever you are looking to learn, check out the list below before trying to wade through pages of search engine listings.

A digital classroom is typically one that incorporates electronic devices and software into the learning environment. 
A digital classroom is where a physical classroom extends into a digital space. 
The space of a digital classroom must hold potential for collaboration or continuing work outside of the classroom: reflective discussion forums online can be a good way to address this. In a digital classroom, the tone is set by technology. 

Because technology facilitates easy access to learning resources and networks, it’s easier for students to track their progress and for professors to highlight student work in a digital classroom.
A digital classroom refers to a classroom that is fully immersed in technology. 
These classrooms rely on educational apps and websites to enhance student learning. 
Feedback loops and technology are also important parts of a digital classroom.

Many of these sites offer free lessons; some require payment or offer verified certification for a nominal fee. Some sites offer very general non-academic lessons, others provided actual college / university curriculum course material. Whatever you are looking to learn, check out the list below before trying to wade through pages of search engine listings.