diff --git a/README.md b/README.md
index c83b795..3bdb150 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,6 @@ Java projects for use with AP Computer Science students.
 
 ## Directories
 * SortingAlgorithms
+** program to explore the implementation and efficiency of different sorting algorithms
+* RandomNumberFiles
+** files of random numbers for use with sorting algorithms