So much in this field the sky is the limit.
For easy that is a releative term.
Lots said on both sides as to the benifits and drawbacks. I personaly think it is a function of what gets put into it. A poor powerpoint silde presentation is poor presentation no matter what form it takes. Good training presentation is a skill and not all traininers can platform well and vice a versa. I am a strong advocate for the use of technology in education.
For a platform that holds your classes and keeps track of testing take a look at Moodle http://moodle.org/
which is free ( no affiliation) and fairly easy to use.
Most schools use Blackboard which will cost you.
Bigger companies use things like Sum Total and CourseMill.
For more advnanced course creation there software such as Toolbook and Lectora.