diff --git a/doc/site/core/fiber.markdown b/doc/site/core/fiber.markdown
index b93d0095..8f9f3c87 100644
--- a/doc/site/core/fiber.markdown
+++ b/doc/site/core/fiber.markdown
@@ -75,11 +75,29 @@ Similar to `Fiber.yield` but provides a value to return to the parent fiber's
 
 ### **call**()
 
-**TODO**
+Invokes the fiber or resumes the fiber if it is in a paused state.
+
+    :::dart
+    var fiber = new Fiber {
+      IO.print("Fiber called")
+      Fiber.yield()
+      IO.print("Fiber called again")
+    }
+    fiber.call()
+    fiber.call()
 
 ### **call**(value)
 
-**TODO**
+Invokes the fiber or resumes the fiber if it is in a paused state and sets
+`value` as the returned value of the fiber's call to `yield`.
+
+    :::dart
+    var fiber = new Fiber {
+      var value = Fiber.yield()
+      IO.print(value + 1)
+    }
+    fiber.call()
+    fiber.call(1) // 2.
 
 ### **isDone**
 
diff --git a/doc/site/core/fn.markdown b/doc/site/core/fn.markdown
index 6677be39..bbbbc404 100644
--- a/doc/site/core/fn.markdown
+++ b/doc/site/core/fn.markdown
@@ -30,4 +30,14 @@ The number of arguments the function requires.
 
 ### **call**(args...)
 
-**TODO**
+Invokes the function with the given arguments.
+
+    :::dart
+    var fn = new Fn { |arg|
+      IO.print(arg)
+    }
+    fn.call("Hello world") // Hello world.
+
+It is a runtime error if the number of arguments given is less than the arity of
+the function. If more arguments are given than the arity of the function they
+will be discarded.
\ No newline at end of file
diff --git a/doc/site/core/list.markdown b/doc/site/core/list.markdown
index 89961168..a4577028 100644
--- a/doc/site/core/list.markdown
+++ b/doc/site/core/list.markdown
@@ -21,7 +21,19 @@ The number of elements in the list.
 
 ### **insert**(index, item)
 
-**TODO**
+Inserts the `item` at the `index` in the list.
+
+    :::dart
+    var list = ["a", "b", "c", "d"]
+    list.insert(1, "e")
+    IO.print(list) // "[a, e, b, c, d]"
+
+Returns the inserted item.
+
+    :::dart
+    IO.print(["a", "c"].insert(1, "b")) // "b".
+
+It is a runtime error if the index is not an integer or is out of bounds.
 
 ### **iterate**(iterator), **iteratorValue**(iterator)