Levels and techniques of evaluation in educational technology

We Define the level and techniques of evaluation.....
This study about An Evaluation of Open Source Learning Management SystemsAccording to Learners Tools
In this study by <>
Background:The Learning Management System (LMS) is the main element of the internet-based education. In parallel to this, these studies in this area are increasing. The aim of this research is to evaluate the current existing Open Source Learning Management Systems in the market. For this, seventy two Open Source Learning Management Systems have been subjected to general evaluation .
Those software uses Three Level and Technique chosen were investigated in detail according to features of the Communication Tools uses Discussion forums, File Sharing and E-Mail and Chat, Productivity Tools uses Bookmarks and Help, Student Involvement Tools uses Group work , Student Community Building and Student Portfolios.
The Software have been evaluated by being members of websites, using demo programs and in accordance to the features of given at the internet website.
Reference:
· http://www.eric.ed.gov/ERICDocs/data/ericdocs2sql/content_storage_01/0000019b/80/27/f5/f5.pdf