create more placeholder pages

content/modules/activities/_index.md

@@ -10,5 +10,12 @@ Activites are the things students are expected to _attend_ for a module. These a
 | ---- | ------------------------------------------ | ------- |
 | Label | The name of the activity (student facing) | Computing Concepts |
 | Type | The type of activity (lecture, online workshop, etc...) | Lecture |
-| ? | |
+| Duration | The length of **each** session (in hours) | 2 |
+| Week Range | The weeks this activity will run in | 1-5,7-9 |
+| Weeks | The total number of weeks the activity runs for (automatically calculated) | 6 |
 
+**TIP** If an activity does not need to be split (ie, there is one iteration required) leave the student count **blank** - the tool should show `(everyone)`
+
+## Mangaging Iterations
+
+Once an activity has been created, you need to create [iterations](iteration) to tell the tool which staff and rooms should be attached to the activity. If you do not do this, the activity will **not** be scheduled.

content/modules/activities/staff.md

+---
+title: Staff Hours
+---
+
+When you have a complex module which lots of activies which have multiple iterations and which run over multiple weeks it can be tricky to keep track of the number of hours being requested for staff.
+
+The _staff hours_ view shows the total number of hours across iterations for a staff member.

content/modules/assessments/_index.md

+---
+title: Assessments
+---
+
+Assessments are an experimental feature. It would be best not to use them for this cycle.

content/modules/cohorts/_index.md

+---
+title: Module Cohorts
+---
+
+A _cohort_ is a group of students which joined a course in a given academic cycle. We use these to get an idea of the numbers required and help to plan _iterations_ for a module. Please note that the actual students themselves and the courses are part of the timetable feed (don't come from us)!
+
+## Attaching cohorts
+
+If a cohort is missing from a module, you can add them to the module using the _module cohort_ tool.
+
+**SCREENSHOT HERE**
+
+Select the module you wish to edit on the dropdown list. You can then attach or remove cohorts using the buttons in the center of the view. This will effect the students expected for a given module in the module view.