diff --git a/docs/src/lecture/0-intro.md b/docs/src/lecture/0-intro.md
index 0972d88ed99623a223181154f240a151cd1176e5..f15b87c60e8f8de3da27de741a24f5664076b753 100644
--- a/docs/src/lecture/0-intro.md
+++ b/docs/src/lecture/0-intro.md
@@ -114,9 +114,10 @@ Use `>` for block quotes.
 
 ## Integrated Development Environment (IDE)
 - **VS Code**: All-in-one solution, quite good for Julia programming
-TOOD: Insert picture explaning different workspaces
 - Other choices: Vim, Emacs, Atom, Jetbrains, ...
 
+![Alt text](./figs/vscode-julia.png)
+
 ## Further Reading/References
 
 - CLick PDF slides in https://thsn.dev/blog/publishing-reproducable-numerics
diff --git a/docs/src/lecture/4-julia_testing.md b/docs/src/lecture/4-julia_testing.md
index 35af662ad915f98f524028829d230d3f52cdcab0..2c17b4b74368a1d60e53a569440951ed01e325d6 100644
--- a/docs/src/lecture/4-julia_testing.md
+++ b/docs/src/lecture/4-julia_testing.md
@@ -69,7 +69,23 @@ Alternatively, you can run your tests directly from the command line without ent
 
 This command will execute all tests defined in your project's `test` directory.
 
-TODO: Add example output.
+```julia
+# Addition Tests: Test Failed at XXX/gits/nmh/SustainableSoftwareEngineering.jl/test/test_add.jl:7
+#   Expression: add(0, 0) == 1
+#    Evaluated: 0 == 1
+#
+# Stacktrace:
+#  [1] macro expansion
+#    @ /usr/local/Cellar/julia/1.9.3/share/julia/stdlib/v1.9/Test/src/Test.jl:478 [inlined]
+#  [2] macro expansion
+#    @ ~/Desktop/gits/nmh/SustainableSoftwareEngineering.jl/test/test_add.jl:7 [inlined]
+#  [3] macro expansion
+#    @ /usr/local/Cellar/julia/1.9.3/share/julia/stdlib/v1.9/Test/src/Test.jl:1498 [inlined]
+#  [4] top-level scope
+#    @ ~/Desktop/gits/nmh/SustainableSoftwareEngineering.jl/test/test_add.jl:5
+# Test Summary:  | Pass  Fail  Total  Time
+# Addition Tests |    3     1      4  0.8s
+```
 
 ## Test Coverage
 
diff --git a/docs/src/lecture/9-todo.md b/docs/src/lecture/9-todo.md
deleted file mode 100644
index dcc681b56c8e8d25f888a8d784e44aa7d9fa8e08..0000000000000000000000000000000000000000
--- a/docs/src/lecture/9-todo.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Todo
-- see other course if something is missing
-- add some exercises for students
diff --git a/docs/src/lecture/figs/vscode-julia.png b/docs/src/lecture/figs/vscode-julia.png
new file mode 100644
index 0000000000000000000000000000000000000000..9fa37e2a36b9e0da65e118bfea03c1d38fc926f2
Binary files /dev/null and b/docs/src/lecture/figs/vscode-julia.png differ