There are a lot of practice tests, study guides, and scams on the internet for high schoolers. Some are helpful and others are just plain hurtful. Finding a resource to help your students succeed without sending them toward a commercial can be hard to do. Enter the Khan Academy.
Khan is a not for profit organization that offers online tutoring with videos, practice assignments, and a community to help socially train students in areas they need extra instruction. Each subject is broken into smaller parts that offer a guided lesson format but also allows for free roaming between lessons. There are practice assignments as well as community voted assignments.
This allows for students to take a course, see examples, and practice what they learn. However while most online tutoring classes like this only give instruction--Khan actually has the community help to supply feedback about how you are doing.
In a way this is outsourcing social media to create a semi-structured classroom environment. In addition you can network, host your own class, and display the work that you do. In a way this creates a great opportunity for teachers to place their material online for students to review later however it does not offer the same monetization that other resources like Udemy can offer. Meaning that the Academy is not a marketplace for private tutors but just a resource for existing ones.
Critics of Khan say that some videos offered from the company contain mistakes or are hard to follow. Many say that the instructors may not be the most qualified to teach the courses. These issues were taken seriously by the Academy and they allow for suggestions of mistakes, questions, make regular corrections to videos, and in general try to be transparent that mistakes happen. Students would not get this for resources like Udemy where the company treats the course material as the sole responsibility (with some exception) to the teacher.
For a student who needs extra instruction or practice Khan Academy is a great resource. Adding it to a study schedule can help boast one’s understanding of concepts they may need extra help in. Additionally it can be taken on the go at the student’s leasure (something the traditional classroom cannot do alone).
I give Khan four out of five dancing hamsters as a learning resource. It shouldn't be used solely but as an additive to a self learning curriculum it makes a great resource.
Find it here: https://www.khanacademy.org/library
Read more of my thoughts on the matter here: http://droverdata.wordpress.com/2014/07/23/review-of-khan-academy-resource/