diff --git a/_episodes/01-jets101.md b/_episodes/01-jets101.md
index 10ab2f21..a5ba140e 100644
--- a/_episodes/01-jets101.md
+++ b/_episodes/01-jets101.md
@@ -1,7 +1,6 @@
 ---
 title: "Jets 101"
 teaching: 1h30
-exercises: 3
 questions:
 - "What is a jet?"
 - "Are there different types of jets? What is a recluster algorithm?"
@@ -21,7 +20,7 @@ Full set of intro slides: Slides 1-24 (FIXME)
 > ## After following the instructions in the setup:
 >
 > ~~~
-> cd <YOUR WORKING DIRECTORY>/notebooks/
+> cd <YOUR WORKING DIRECTORY>/notebooks/DAS/
 > source /cvmfs/sft.cern.ch/lcg/views/LCG_103/x86_64-centos7-gcc11-opt/setup.sh
 > jupyter notebook --no-browser --port=8888 --ip 127.0.0.1
 > ~~~
diff --git a/_episodes/02-Pileup_jetID.md b/_episodes/02-Pileup_jetID.md
index 509b9003..aa592480 100644
--- a/_episodes/02-Pileup_jetID.md
+++ b/_episodes/02-Pileup_jetID.md
@@ -1,7 +1,6 @@
 ---
 title: "Pileup and jetID"
-teaching: 0
-exercises: 0
+teaching: 1h30
 questions:
 - "What is pileup and how does it afffect to jets?"
 - "What is the basic jet quality criteria?"
@@ -9,7 +8,8 @@ objectives:
 - "Learn about the pileup mitigation techniques used at CMS."
 - "Learn about about the basic jet quality criteria."
 keypoints:
-- "First key point. Brief Answer to questions. (FIXME)"
+- "We call pileup to the amount of other processes not coming from the main interaction point. We must mitigates its effects to reduce the amount of noise in our events."
+- "Many event variables help us to learn how different pileup was during the data taking period, compared to the pileup that we use in our simulations. The _pileup reweighting_ procedure help us to calibrate the pileup profile in our simulations."
 - "The so-called jetID is the basic jet quality criteria to remove fake jets."
 ---
 
@@ -19,7 +19,7 @@ Full set of intro slides: Slides 30-44 (FIXME)
 > ## After following the instructions in the setup (if you have not done it yet) :
 >
 > ~~~
-> cd <YOUR WORKING DIRECTORY>/notebooks/
+> cd <YOUR WORKING DIRECTORY>/notebooks/DAS/
 > source /cvmfs/sft.cern.ch/lcg/views/LCG_103/x86_64-centos7-gcc11-opt/setup.sh
 > jupyter notebook --no-browser --port=8888 --ip 127.0.0.1
 > ~~~
diff --git a/_episodes/03-JEC_JER.md b/_episodes/03-JEC_JER.md
index f4a363e1..b1c810f2 100644
--- a/_episodes/03-JEC_JER.md
+++ b/_episodes/03-JEC_JER.md
@@ -1,7 +1,6 @@
 ---
 title: "JEC and JER"
 teaching: 1h30
-exercises: 0
 questions:
 - "What are jet energy correction?"
 - "What is jet energy resolution?"
@@ -22,7 +21,7 @@ Covered notebooks: Jet energy corrections (Ex 3.1) and Jet energy resolution (Ex
 > ## After following the instructions in the setup (if you have not done it yet) :
 >
 > ~~~
-> cd <YOUR WORKING DIRECTORY>/notebooks/
+> cd <YOUR WORKING DIRECTORY>/notebooks/DAS/
 > source /cvmfs/sft.cern.ch/lcg/views/LCG_103/x86_64-centos7-gcc11-opt/setup.sh
 > jupyter notebook --no-browser --port=8888 --ip 127.0.0.1
 > ~~~
diff --git a/_episodes/04-Jet_Substructure.md b/_episodes/04-Jet_Substructure.md
index 71daa720..ea601a4c 100644
--- a/_episodes/04-Jet_Substructure.md
+++ b/_episodes/04-Jet_Substructure.md
@@ -1,7 +1,6 @@
 ---
 title: "Jet Substructure"
 teaching: 1h30
-exercises: 6
 questions:
 - "What is jet substructure?"
 - "How to distinguished jets originating from W or top quarks?"
@@ -20,7 +19,7 @@ Full set of intro slides: Slides 58-76 (FIXME)
 > ## After following the instructions in the setup:
 >
 > ~~~
-> cd <YOUR WORKING DIRECTORY>/notebooks/
+> cd <YOUR WORKING DIRECTORY>/notebooks/DAS/
 > source /cvmfs/sft.cern.ch/lcg/views/LCG_103/x86_64-centos7-gcc11-opt/setup.sh
 > jupyter notebook --no-browser --port=8888 --ip 127.0.0.1
 > ~~~