diff --git a/slides/3.yml b/slides/3.yml
index 91ee2b66..36ee30e8 100644
--- a/slides/3.yml
+++ b/slides/3.yml
@@ -49,7 +49,9 @@ chapters:
   - k8s/monitoring-intro.md
   #- k8s/prometheus-intro.md
   - k8s/prometheus-endpoint.md
+  - k8s/exercise-prometheus.md
   - k8s/opentelemetry.md
+  - k8s/exercise-opentelemetry.md
 
 
     #-
diff --git a/slides/k8s/exercise-opentelemetry.md b/slides/k8s/exercise-opentelemetry.md
new file mode 100644
index 00000000..dcffaab5
--- /dev/null
+++ b/slides/k8s/exercise-opentelemetry.md
@@ -0,0 +1,5 @@
+## Exercice - monitor with prometheus
+
+Complete exercise #5, (again code at: https://github.com/enix/kubecoin )
+
+*Note: Not all daemon are "ready" for opentelemetry, only `rng` and `worker`
diff --git a/slides/k8s/exercise-prometheus.md b/slides/k8s/exercise-prometheus.md
new file mode 100644
index 00000000..6ec057e7
--- /dev/null
+++ b/slides/k8s/exercise-prometheus.md
@@ -0,0 +1,5 @@
+## Exercice - monitor with prometheus
+
+Complete exercise #4, (again code at: https://github.com/enix/kubecoin )
+
+*Note: Not all daemon are "ready" for prometheus, only `hasher` and `redis`
diff --git a/slides/k8s/opentelemetry.md b/slides/k8s/opentelemetry.md
index a22153a7..4690d582 100644
--- a/slides/k8s/opentelemetry.md
+++ b/slides/k8s/opentelemetry.md
@@ -1,6 +1,6 @@
 # OpenTelemetry
 
-*Opentelemetry* is a "tracing" framework. It's a fusion of two other frameworks:
+*OpenTelemetry* is a "tracing" framework. It's a fusion of two other frameworks:
 *opentracing* and *opencensus*.
 
 The goal is to have deep integration with software languages and application framework to