Things to consider

What is  e-learning?
E -learning is refers to learning that takes places using technology, such as the Internet, CD-ROMs and
portable devices like mobile phones or MP3 players.
We can use the technology and teaching to students forexample hotpotato is we make quiz simply and we can use our materials in the class.
What is authoring tools?
Authoring tool is an installable program that the allows you to create materials.
Authoring tools usually feature a simple design interface. Elements allowing me to add pictures, sounds and video material to the students.
what are electronic materials?
computer,CD-ROM, MP3player is electronic materials

I think e learning and authoring tool, electronic material is very simillar
because we use the computer and teaching to the students, authoring tool is we create materials
This is also we can through the hotpotato site and make quiz then we can teach the students.
And then electronic material is compute CD-ROM that mean is we can use a computer then this method also include the E-learning Therefore E-learning is very useful for me or the other teacher and very useful than we make material by hand . also this learning way is we use the well students also like this way.

Things to consider

I think EFL related is useful the english academy for EFL class students.
Autentic websites also useful searching our impormation and we are learning study
The other engin is naver, and youtube sites
we can search our impormation for naver someone is reply our question so it is good but something is I can't find it. Youtube site is very useful many people because that site is free so everyone like this site especially we are learning study more funny and  easy because we'll search our impormation many video clips is appear so we look careful and find many levels video. I think youtube site is very useful other person.
This engin is normally used our class Teacher wants to learning more funny and they want to foucus for teacher then used engin and teaching students.