diff --git a/exercise-sheet-1.Rmd b/exercise-sheet-1.Rmd
index 95e0c0b..b81a688 100644
--- a/exercise-sheet-1.Rmd
+++ b/exercise-sheet-1.Rmd
@@ -266,11 +266,11 @@ For the programming tasks, please follow the instructions given in GitHub Classr
 
 ### 1) Intro and warm-up python programming tasks:
 
-[https://classroom.github.com/a/i_FyA5SR](https://classroom.github.com/a/i_FyA5SR)
+[https://classroom.github.com/a/SUI8mcnU](https://classroom.github.com/a/SUI8mcnU)
 
 ### 2) Hidden Markov Models tasks:
 
-[https://classroom.github.com/a/E-FEwES4](https://classroom.github.com/a/E-FEwES4)
+[https://classroom.github.com/a/ApR1EvKU](https://classroom.github.com/a/ApR1EvKU)
 
 
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diff --git a/exercise-sheet-10.Rmd b/exercise-sheet-10.Rmd
index 89c6973..6a0672b 100644
--- a/exercise-sheet-10.Rmd
+++ b/exercise-sheet-10.Rmd
@@ -188,7 +188,7 @@ local alignment has to be performed.
 For the programming tasks, please follow the instructions given in GitHub Classroom under the following link.
 
 
-[https://classroom.github.com/a/ABJ6qwOf](https://classroom.github.com/a/ABJ6qwOf)
+[https://classroom.github.com/a/7TbHYZaw](https://classroom.github.com/a/7TbHYZaw)
 
 
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diff --git a/exercise-sheet-6.Rmd b/exercise-sheet-6.Rmd
index a323a54..faa5f92 100644
--- a/exercise-sheet-6.Rmd
+++ b/exercise-sheet-6.Rmd
@@ -251,7 +251,7 @@ What happens if we vary the parameters *k* and $T_1$?
 For the programming tasks, please follow the instructions given in GitHub Classroom under the following link.
 
 
-[https://classroom.github.com/a/nxAqfoYx](https://classroom.github.com/a/nxAqfoYx)
+[https://classroom.github.com/a/HoQv5vpm](https://classroom.github.com/a/HoQv5vpm)
 
 
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