There is a huge range of resources available to the modern teacher, and the right selection is crucial in delivering effective lessons. I agree that there will always be a place for course books in the school curriculum, despite the many benefits of the Internet.
Firstly, course books (whether conventional or digital) have been developed by pedagogical
experts and designed to be incorporated into a subject syllabus, leading to testing procedures such as formal examinations or continuous assessment. This means that they are proven to improve students’ academic achievement, enhancing their potential for progression to further or higher education. Furthermore, the use of modern course books allows pupils to coordinate their studies as part of group work, hopefully making their lessons less teacher-led and more about autonomous learning. This in itself teaches study skills such as independent research and synthesising sources, rather than old-fashioned rote-learning. This is where the Internet, in fact, can play a useful part: to supplement and add to knowledge which the students are assimilating via their course books.
However, it is the role of teachers and school management generally to ensure that use of the Internet remains a guided learning process, and not an exercise in data-gathering from Internet sources which may be unreliable or even misleading. It is true that the Internet can be invaluable for adults (for example in distance learning or self-study modules) who are able to discriminate between sources and sift information to marshal their facts. However, this is a mature skill and we should not assume that school age pupils are ready to do this.
Overall, it appears that course books, with their quality and depth of material, are set to remain an integral part of the syllabus. The internet can be judged a useful supplement to this, if used carefully and under supervision. 
There is a huge range of resources available to the modern teacher, and the right selection is crucial in delivering effective lessons. I  
agree
 that there will always be a place for  
course
  books
 in the school curriculum, despite the  
many
 benefits of the Internet. 
Firstly
,  
course
  books
 (whether conventional or digital) have  
been developed
 by pedagogical 
experts
 and designed to  
be incorporated
 into a subject syllabus, leading to testing procedures such as formal examinations or continuous assessment. This means that they  
are proven
 to  
improve
 students’ academic achievement, enhancing their potential for progression to  
further
 or higher education.  
Furthermore
, the  
use
 of modern  
course
  books
  allows
 pupils to coordinate their studies as part of group work,  
hopefully
 making their lessons less teacher-led and more about autonomous learning. This in itself teaches study  
skills
 such as independent research and  
synthesising
 sources,  
rather
 than  
old
-fashioned rote-learning. This is where the Internet, in fact, can play a useful part: to supplement and  
add
 to knowledge which the students are assimilating via their  
course
 books. 
However
, it is the role of teachers and school management  
generally
 to ensure that  
use
 of the Internet remains a guided learning process, and not an exercise in data-gathering from Internet sources which may be unreliable or even misleading. It is true that the Internet can be invaluable for adults ( 
for example
 in distance learning or self-study modules) who are able to discriminate between sources and sift information to marshal their facts.  
However
, this is a mature  
skill and
 we should not assume that school age pupils are ready to do this. 
Overall
, it appears that  
course
  books
, with their quality and depth of material,  
are set
 to remain an integral part of the syllabus. The internet can  
be judged
 a useful supplement to this, if  
used
  carefully
 and under supervision.