diff --git a/doc/release-notes/teachpack/HISTORY.txt b/doc/release-notes/teachpack/HISTORY.txt
index fd9bd64f91..4954df644d 100644
--- a/doc/release-notes/teachpack/HISTORY.txt
+++ b/doc/release-notes/teachpack/HISTORY.txt
@@ -1,3 +1,11 @@
+------------------------------------------------------------------------
+Version 5.1.2				  [Fri Jul 22 15:27:37 EDT 2011]
+
+* The error messages of the image and universe teachpacks have been 
+  revised substantially. They will be improved again next release. 
+
+* 5.1.3: the on-tick clause now takes a max number of ticks 
+  
 ------------------------------------------------------------------------
 Version 5.1.1				  [Tue Apr 26 22:38:44 EDT 2011]