Manufacturers must now begin making television sets that can block programs according to the ratings codes.

Some newer teachers have complained that the union has blocked new programs in the schools.

Eventually, parents will be able to activate a microchip to block programs.

Now television manufacturers must begin making sets with the V-chip, which provides the ability to block programs according to the ratings codes.

Also, it can block channels and programs from children's viewing.

So some suggest putting computer chips in new sets that let parents block violent programs.

But if those blocking such programs are wrong, "their children will be dead."

But that approach cannot block programs according to their ratings.

Eventually, the ratings technology will let parents activate a microchip that can block programs.

The V-chip also can block programs based on any future rating system.