How do you document progress in the area of pragmatics/social language development? Its quite tricky due to the emotionality of the moment, dis-inhibition, and other stressors. However, one good way to document progress over time in this area is to break down the skill in terms of the level of knowledge about the skill that you are expecting the student to demonstrate.
For example, from the identification of a weakness in the area of understanding and labeling emotions at an initial evaluation , you may want to write their initial IEP goal similar to "By the end of the IEP period, the student will appropriately label 8 out of 10 emotions when given an example and be able to demonstrate whether it was an appropriate or inappropriate emotion (Level 2)". Later, you may update the goal as "By the end of the IEP period, the student will appropriately label 8 out of 10 emotions by stating why its important to understand your emotions, give examples of situations where that emotion would be appropriate and generate ideas of how to change an inappropriate emotion to an appropriate emotion (Level 5)".
The BEST PART about this tool is that the second page is a Run Chart where the student documents their own progress towards their goals over time. This helps build a meta-linguistic knowledge of what they are being expected to be able to do. Without a tool like this, how do students know how well they are progressing? It would be sort of like being on a diet, but never weighing yourself... how do you know if what you are doing is working? I use this tool to assess my students a minimum of 3 times a year so that they can be aware of their progress (or lack thereof) and so that progress can be documented over time.