diff --git a/.gitignore b/.gitignore
index 891e5c9..f2a4c95 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,12 +9,13 @@
 *.log
 *.nav
 *.out
+*.pdf
 *.run.xml
 *.snm
 *.toc
 
-# generated pdfs (libreoffice)
-handout.pdf
+# Exclude latex assets
+!/latex/assets/*
 
 # reveal js (generated)
 /revealjs/*/index.html
diff --git a/Makefile b/Makefile
index 4bc14c9..cf7a713 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,11 @@ default:
 
 .PHONY: clean
 clean:
-	rm -f revealjs/*/index.html revealjs/*/index.pdf */*/handout.pdf
+	rm -f \
+		*/*/handout.pdf \
+		latex/*/index.pdf \
+		revealjs/*/index.html \
+		revealjs/*/index.pdf
 
 revealjs/%/index.html: revealjs/%/*.md
 	python3 revealjs/build.py $@
diff --git a/latex/biologischer-kohlenstoffkreislauf/index.pdf b/latex/biologischer-kohlenstoffkreislauf/index.pdf
deleted file mode 100644
index 1036da3..0000000
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diff --git a/latex/brom/index.pdf b/latex/brom/index.pdf
deleted file mode 100644
index 8580ec8..0000000
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diff --git a/latex/emilia-galotti/index.pdf b/latex/emilia-galotti/index.pdf
deleted file mode 100644
index 1917d0b..0000000
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diff --git a/latex/machine-learning/index.pdf b/latex/machine-learning/index.pdf
deleted file mode 100644
index 8be523e..0000000
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