diff --git a/15_brasil/matlab/grainExercises.m b/15_brasil/matlab/grainExercises.m
new file mode 100644
index 0000000..537aeed
--- /dev/null
+++ b/15_brasil/matlab/grainExercises.m
@@ -0,0 +1,71 @@
+%%             MTEX Workshop Belo Horizonte 2015
+%
+%%                      Exercises
+%
+%                Ralf Hielscher (1) and David Mainprice (2)
+%
+%  (1) TU Chemnitz, Germany
+%  (2) Universite Montpellier, France
+%
+% The following script guides you through the analysis of an Forsterite
+% sample. The original script by David Mainprice was about 800 lines. I
+% removed all the code and encourage you to rewrite it. You may find some
+% hints on the way.
+%
+% important shortcuts:
+% Strg + Return         - run the current section
+% Shift + Strg + Return - run the current section and go to the next one
+% F9                    - evaluate the selected command
+%
+
+%% Data Import
+%
+% Have a first look at the data. Which phases are present?
+
+% this imports some sample MTEX data
+mtexdata csl
+plotx2east
+
+
+%% Exercise 1
+% Visualize the EBSD map according to orientations
+
+
+
+%% Exercise 2
+% Compute grains and plot the grain boundaries at top of the orientation
+% map.
+
+
+
+%% Exercise 3
+% Colorize the grain boundaries according the misorientation angle.
+
+
+%% Exercise 4
+% Extract all iron to iron grain boundaries. What is its total length?
+%
+% useful commands: gB.segLength -> length of a grain boundary segment
+
+
+
+%% Exercise 5
+% Visualize all non iron to iron grain boundaries.
+
+
+
+%% Exercise 6
+% Find all CSL(3) boundaries with the list of iron to iron grain
+% boundaries. As a threshold use 3 degree.
+% What is the relative length of CSL(3) grain boundaries in comparison to
+% all iron to iron grain boundaries?
+
+
+%% Exercise 7
+% Visualize the CSL(3) grain boundaries on top of a grain plot
+
+
+%%  Exercise 8
+% Are there also other CSL boundaries present? Determine their relative
+% length and visualize them in a grain plot.
+