salam
here is the teacher's guide for the MS3 level "old book" , which goes also with the new book , in reality it's not a new book they just slimmed the tasks and reduce some of them in order to enable the teachers achieve the programme
the guide gives full description of the features of the book with file plans
This will help the teachers understand the aim of each teaching skill presented in the MS3 manual
Here is the link:
https://www.4shared.com/document/ETKwZYwN/ANGLAIS.html