Computer as the Teacher

I am Vincent Cate, one of Henry's brothers.   I live in Anguilla, a small island in the Caribbean.   The private school here is asking me for nearly 3 times as much money for next year as I paid last year.  I have decided it is time to start homeschooling.

There is no private school for 7th to 12th grades in Anguilla.   A number of parents send their children to the next island at great cost and extra time for the children.   If I can get computers to do most of the teaching I may be able to start a school and get some paying students and make some extra money.   I am wondering if computers can do most of the education for junior high and high school age students, so that one teacher might have 10 or 20 students even when they are at different ages.   My plan is to start with just my two older boys (ages 9 and 11 in Sept) for the fall.   After this, if I think I can handle another 10 kids, and if I can get a school license, then maybe expand in January.

I am a Libertarian atheist.  I don't want a religious education for my kids, nor one that makes it seem like big government is a good thing.

The Calvert School seems very good but when I spoke with them they seemed to strongly believe that humans have to do the teaching, not computers.  I think they are wrong and that computers can be very good teachers and are the future of teaching.

I have been impressed with or had recommended to me the following computer based education.  We are already at the point that students learn much faster with many of these than sitting in a normal class with 10 or 20 other students listening to a teacher.   The software and online videos will keep getting better.
It seems that K12 provides a good general education where the computer does most of the teaching.   My current thinking is that K12 will be our main source  with the others above as extras.   I am looking for any feedback anyone can give.   Does my plan seem reasonable?   Are the above sources ok for a Libertarian atheist?  Are there others you can recommend?

Short videos on Physics

MinutePhysics puts together short two to three minute videos explaining some basic concepts of physics.

Here is their explanation of How far is a second: