diff --git a/units/en/communication/certification.mdx b/units/en/communication/certification.mdx
index bf836f8..d82ef65 100644
--- a/units/en/communication/certification.mdx
+++ b/units/en/communication/certification.mdx
@@ -3,8 +3,10 @@
The certification process is **completely free**:
-- To get a *certificate of completion*: you need **to pass 80% of the assignments** before the end of September 2023.
-- To get a *certificate of excellence*: you need **to pass 100% of the assignments** before the end of September 2023.
+- To get a *certificate of completion*: you need **to pass 80% of the assignments**.
+- To get a *certificate of excellence*: you need **to pass 100% of the assignments**.
+
+There's **no deadlines, the course is self-paced**.
diff --git a/units/en/unit0/introduction.mdx b/units/en/unit0/introduction.mdx
index 4b35c3c..fec1422 100644
--- a/units/en/unit0/introduction.mdx
+++ b/units/en/unit0/introduction.mdx
@@ -59,10 +59,11 @@ This is the course's syllabus:
You can choose to follow this course either:
-- *To get a certificate of completion*: you need to complete 80% of the assignments before the end of September 2023.
-- *To get a certificate of honors*: you need to complete 100% of the assignments before the end of September 2023.
-- *As a simple audit*: you can participate in all challenges and do assignments if you want, but you have no deadlines.
+- *To get a certificate of completion*: you need to complete 80% of the assignments.
+- *To get a certificate of honors*: you need to complete 100% of the assignments.
+- *As a simple audit*: you can participate in all challenges and do assignments if you want.
+There's **no deadlines, the course is self-paced**.
Both paths **are completely free**.
Whatever path you choose, we advise you **to follow the recommended pace to enjoy the course and challenges with your fellow classmates.**
@@ -72,8 +73,10 @@ You don't need to tell us which path you choose. **If you get more than 80% of t
The certification process is **completely free**:
-- *To get a certificate of completion*: you need to complete 80% of the assignments before the end of September 2023.
-- *To get a certificate of honors*: you need to complete 100% of the assignments before the end of September 2023.
+- *To get a certificate of completion*: you need to complete 80% of the assignments.
+- *To get a certificate of honors*: you need to complete 100% of the assignments.
+
+Again, there's **no deadline** since the course is self paced. But our advice **is to follow the recommended pace section**.
@@ -113,7 +116,7 @@ About the team:
- Sayak Paul is a Developer Advocate Engineer at Hugging Face. He's interested in the area of representation learning (self-supervision, semi-supervision, model robustness). And he loves watching crime and action thrillers 🔪.
-## When do the challenges start? [[challenges]]
+## What are the challenges in this course? [[challenges]]
In this new version of the course, you have two types of challenges:
- [A leaderboard](https://huggingface.co/spaces/huggingface-projects/Deep-Reinforcement-Learning-Leaderboard) to compare your agent's performance to other classmates'.
diff --git a/units/en/unit1/hands-on.mdx b/units/en/unit1/hands-on.mdx
index b91eab6..e788cfb 100644
--- a/units/en/unit1/hands-on.mdx
+++ b/units/en/unit1/hands-on.mdx
@@ -315,8 +315,8 @@ We see with `Observation Space Shape (8,)` that the observation is a vector of s
- Vertical speed (y)
- Angle
- Angular speed
-- If the left leg contact point has touched the land
-- If the right leg contact point has touched the land
+- If the left leg contact point has touched the land (boolean)
+- If the right leg contact point has touched the land (boolean)
```python
diff --git a/units/en/unit5/how-mlagents-works.mdx b/units/en/unit5/how-mlagents-works.mdx
index 12acede..f92054f 100644
--- a/units/en/unit5/how-mlagents-works.mdx
+++ b/units/en/unit5/how-mlagents-works.mdx
@@ -31,7 +31,7 @@ With Unity ML-Agents, you have six essential components:
## Inside the Learning Component [[inside-learning-component]]
-Inside the Learning Component, we have **three important elements**:
+Inside the Learning Component, we have **two important elements**:
- The first is the *agent component*, the actor of the scene. We’ll **train the agent by optimizing its policy** (which will tell us what action to take in each state). The policy is called the *Brain*.
- Finally, there is the *Academy*. This component **orchestrates agents and their decision-making processes**. Think of this Academy as a teacher who handles Python API requests.