use-deliver/overview: Fill contents

Fill contents for the introduction to the "Using and Delivering Content"
chapter.

Signed-off-by: Razvan Deaconescu <[email protected]>

chapters/use-deliver/overview/reading/read.md

@@ -1,22 +1,38 @@
 # Using and Delivering Content
 
-Owner: Liza Babu
-Reviewer: Ștefan Jumărea
+With content being developed and available in the content repositories, educators can configure it, deploy it and use it for their educational activities.
+Content can also be used by learners during self-study activities.
+When educators use content, they both deliver it live, during educational activities, and make it available publicly for self-study activities.
 
-Present:
+As presented in [the "Building Blocks" section](../../../building-blocks/overview/reading/read.md), educators fork the content repository into a delivery repository.
+They configure the content according to their own needs, preferences or specifics of the learner group.
+They then use the deployment and publishing infrastructure to make the content available to learners, both during and outside educational activities.
+Optionally, educators may also fork solution repositories into a solution delivery repositories.
 
-- who the implementation specific repository is organized, by referring content in the content repository
-- how components of the actual education delivery phase are used;
-  each is having a dedicated section
-
-This chapter describes how each teaching activity is mapped to different types of content.
-
-The mapping between teaching activities and types of content is presented in the [Introduction](../../../landing-page/read.md).
-
-Sections:
+Educators organize content for the different educational activities they employ.
+The mapping between educational activities and types of content is presented in the [Introduction](../../../landing-page/read.md).
+The topics presented in this chapter are dedicated to each educational activity:
 
 - [Lectures](../../lectures/reading/read.md)
 - [Practical Sessions](../../practical-sessions/reading/read.md)
 - [Assignments](../../assignments/reading/read.md)
 - [Tests](../../tests/reading/read.md)
 - [Self-Study](../../self-study/reading/read.md)
+
+In the ideal case, an educator is only required to update the `config.yaml` file in the delivery repository.
+The rest of the content is left unaltered and is thus in perfect sync with the original content repository.
+
+If changes to content are required, the educator is recommended to push the changes to the upstream content repository (hosted under the [`open-education-hub` GitHub organization](https://github.com/open-education-hub)).
+The educator takes the role of contributor to the content repository.
+
+Learners who want to contribute to content will do so in the delivery repository.
+Eventually, the educator will push the contributions to the content repository.
+
+It is recommended the educator be in active contact with the content developer / curator of the content repository for quick integration of contributions.
+And for upstream updates to the delivery repository.
+
+Note that each educator should adapt the use and delivery of content to their specifics.
+The current methodology aims to leave as much freedom to the educator to customize the content and configuration.
+It provides guides, best practices and recommendations.
+Still, educators know best how to structure the content, how to select and blend existing topics for delivery.
+Moreover, the methodology, being content-centric, makes no recommendations on the actual delivery methods and approaches used by educators during educational activities.