Cooperative Learning "The Article of Descriptive text"

I have already read about Cooperative learning's article from EFL Magazine. Here is the link
http://eflmagazine.com/cooperative-learning/

I think this article included from Descriptive text, because it has identification based on paragraph one. Then, it has more specific description about it such as paragraph two until the end.

The characteristic of descriptive text that is support from the article is :
1. Using simple present tense : Example The basis for cooperative learning is to set up the classroom so that learners are positively interdependent on each other. Cooperative activities are ‘structured group work’ within a framework enabling learners to take an active part by setting parameters and often assigning specific roles.  It is also an excellent combination of cognitive and social skills. The teacher is responsible for giving out the instructions, setting up the groups and the task and to help when help is needed. However, the bulk of the work is actually done by the learners who have to help each other to complete the tasks that are set for them.
2. Using to be (are, am, is) : Example  Cooperative learning is a technique which is based on ideas by the educators John Dewey, Kurt Levin and Morton Deutsch in the 1930s and 40s.
3. Describe something more specific. For example from that article. It describe more specific detail of cooperative learning.