diff --git a/Makefile b/Makefile
index b59d881..140f584 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ BASENAME=scientificcomputing-script
 SUBDIRS=programming debugging plotting codestyle statistics bootstrap regression likelihood pointprocesses designpattern 
 SUBTEXS=$(foreach subd, $(SUBDIRS), $(subd)/lecture/$(subd).tex)
 
-all : plots chapters index script
+all : plots chapters index script exercises
 
 chapters :
 	for sd in $(SUBDIRS); do $(MAKE) -C $$sd/lecture chapter; done
@@ -37,6 +37,11 @@ watchpdf :
 watchscript :
 	while true; do ! make -s -q script && make script; sleep 0.5; done
 
+
+exercises:
+	for sd in $(SUBDIRS); do if test -d $$sd/exercises; then $(MAKE) -C $$sd/exercises pdf; fi; done
+
+
 cleanplots:
 	for sd in $(SUBDIRS); do $(MAKE) -C $$sd/lecture cleanplots; done
 
@@ -46,6 +51,7 @@ cleantex:
 
 clean : cleantex
 	for sd in $(SUBDIRS); do $(MAKE) -C $$sd/lecture clean; done
+	for sd in $(SUBDIRS); do if test -d $$sd/exercises; then $(MAKE) -C $$sd/exercises clean; fi; done
 
 cleanall : clean
 	rm -f $(BASENAME).pdf