I have posted about the Autodesk BIM Curriculum before, but it is worth mentioning again. It is a great collection of resources, videos, whitepapers, downloadables, and targeted lessons that can help improve your understanding and ability when it comes to specific BIM tasks.

For example, there is a focused set of lessons relating to quantity takeoff in Revit and Navisworks.

Some of these videos have also been uploaded to Youtube. Here is a playlist:

Main lesson page:
Lesson 3: Model-Based Estimating and Quantity Takeoff | BIM Curriculum

The Autodesk BIM for Architecture, Engineering, and Construction Management Curriculum can be freely accessed from here.  Click on the various Units on the right hand side of the page.

For example, Unit 1 contains links to various whitepapers.

You can view all of the Curriculum videos here.

Heads up via:
Google Translate of Education – Curriculums BIM Revit Architecture pour les Professeurs en t�l�chargement gratuit ! – Village BIM