diff --git a/slides/k8s/bootstrap.md b/slides/k8s/bootstrap.md
index b8531dc3..ab8d3657 100644
--- a/slides/k8s/bootstrap.md
+++ b/slides/k8s/bootstrap.md
@@ -1,4 +1,4 @@
-# TLS bootstrap
+# TLS bootstrap (extra material)
 
 - kubelet needs TLS keys and certificates to communicate with the control plane
 
diff --git a/slides/k8s/cloud-controller-manager.md b/slides/k8s/cloud-controller-manager.md
index d0975278..82a62b58 100644
--- a/slides/k8s/cloud-controller-manager.md
+++ b/slides/k8s/cloud-controller-manager.md
@@ -81,16 +81,6 @@ The list includes the following providers:
 
 ---
 
-## Audience questions
-
-- What kind of clouds are you using / planning to use?
-
-- What kind of details would you like to see in this section?
-
-- Would you appreciate details on clouds that you don't / won't use?
-
----
-
 ## Cloud Controller Manager in practice
 
 - Write a configuration file
diff --git a/slides/k8s/operators-design.md b/slides/k8s/operators-design.md
index 9a02f2b8..7feb7c04 100644
--- a/slides/k8s/operators-design.md
+++ b/slides/k8s/operators-design.md
@@ -1,4 +1,4 @@
-## What does it take to write an operator?
+## Operator design (extra material)
 
 - Writing a quick-and-dirty operator, or a POC/MVP, is easy
 
diff --git a/slides/k8s/owners-and-dependents.md b/slides/k8s/owners-and-dependents.md
index bce4d2f9..0624541e 100644
--- a/slides/k8s/owners-and-dependents.md
+++ b/slides/k8s/owners-and-dependents.md
@@ -1,4 +1,4 @@
-# Owners and dependents
+# Owners and dependents (extra material)
 
 - Some objects are created by other objects