diff --git a/block6/describing_and_comparing_spaital_patterns.qmd b/block6/describing_and_comparing_spaital_patterns.qmd
index 100eb90..e429114 100644
--- a/block6/describing_and_comparing_spaital_patterns.qmd
+++ b/block6/describing_and_comparing_spaital_patterns.qmd
@@ -2,8 +2,25 @@
 title: Describing and comparing spatial patterns
 ---
 
+## Slides
+
 The workshop slides are at <https://jakubnowosad.com/eon2024/>.
 
+## Prerequisites
+
+Attendees are expected to have a working recent version or R and RStudio installed, along with several R packages listed below.
+
+- R: <https://cloud.r-project.org/>
+- RStudio: <https://posit.co/download/rstudio-desktop/#download>
+
+```r
+install.packages("remotes")
+pkg_list = c("terra", "sf", "landscapemetrics", "motif", "tidyr", "dplyr")
+remotes::install_cran(pkg_list)
+```
+
+## Exercises
+
 The slides are accompanied by practical exercises.
 The best way to get them is to download the exercises repository as a ZIP file from <https://github.com/Nowosad/eon2024-exercises/archive/refs/heads/main.zip> and unpack it on your computer.
 Then, you can open the `.Rproj` file and start working on the exercises in RStudio.