diff --git a/_data/concepts.yml b/_data/concepts.yml
index 735eaf1866..945abe6f6f 100644
--- a/_data/concepts.yml
+++ b/_data/concepts.yml
@@ -22,10 +22,17 @@ toc:
   - docs/concepts/architecture/master-node-communication.md
   - docs/concepts/architecture/cloud-controller.md
 
-- title: Extending the Kubernetes API
+- title: Extending Kubernetes
   section:
-  - docs/concepts/api-extension/custom-resources.md
-  - docs/concepts/api-extension/apiserver-aggregation.md
+  - title: Extending the Kubernetes API
+    section:
+    - docs/concepts/api-extension/apiserver-aggregation.md
+    - docs/concepts/api-extension/custom-resources.md
+  - title: Compute, Storage, and Networking Extensions
+    section:
+    - docs/concepts/cluster-administration/network-plugins.md
+    - docs/concepts/cluster-administration/device-plugins.md
+    - docs/concepts/cluster-administration/sysctl-cluster.md
 
 - title: Containers
   section: