Flesh out syllabus docs

Add section about selecting or coming up with stories for concept exercises.
exercism · kytrinyx · Sep 19, 2022 · Jul 6, 2022 · Aug 15, 2022 · Aug 15, 2022
commit d25afba678fa05bca7b10e134b39fe5c88416aa5
diff --git a/building/tracks/syllabus/README.md b/building/tracks/syllabus/README.md
@@ -93,3 +93,23 @@ Handwave over some complexity in one so that you can get students familiar with
 It's perfectly fine to say that something will be introduced in more depth later, and that for now the student just needs to understand this one bit.
 
 Concepts are understood more deeply in stages and over time.
+
+## Selecting stories
+
+A concept exercise always has a story.
+
+If you're forking an exercise from another track, then the exercise will already have a story.
+In that case, you're all set.
+
+To see if there are any existing stories you can use or exercises you can fork, check out the [list of stories](docs/building/tracks/stories).
+
+If you have a concept but no story then our recommendation is to write a small, simple code example that uses the concept that you're introducing.
+Then reverse engineer a story onto the code.
+Keep the story stupidly simple.
+It doesn't have to be good fiction.
+It doesn't need a strong plot or character development.
+
+Bounce ideas for stories with the Exercism team.
+We have a lot of experience coming up with suitable stories.
+
+Once you have a story you will likely need to tweak the code a bit to get it to fit the story.