--- loncom/html/adm/help/tex/Creating_Math_Response_Problems.tex	2013/07/05 18:30:40	1.2
+++ loncom/html/adm/help/tex/Creating_Math_Response_Problems.tex	2013/08/27 20:10:51	1.3
@@ -2,7 +2,7 @@
 
 Math response problems use a cas system to evaluate the student response. Which computer algebra system is to 
 be used is specified in the cas argument of the mathresponse tag; both Maxima and R are supported. Maxima and R 
-are also a powerful stand-alone programs that can be installed on most operating systems. If you are interested 
+are also powerful stand-alone programs that can be installed on most operating systems. If you are interested 
 in writing Maxima or R problems, it is a good idea to install a copy on your operating system to access help, 
 learn syntax, and test your expected responses outside the LON-CAPA environment. 
 See \texttt{http://maxima.sourceforge.net/} or \texttt{http://www.r-project.org/}.