diff --git a/quarto/index.qmd b/quarto/index.qmd
index 48ddcd0..ae90702 100644
--- a/quarto/index.qmd
+++ b/quarto/index.qmd
@@ -31,7 +31,7 @@ flexible enough to be used as a backend for Apple's Siri
 feature. ("Siri what is the graph of x squared minus 4?")  For
 learning purposes, computer algebra systems model very well the
 algebraic/symbolic treatment of the material while providing means to
-illustrate the numeric aspects.  Theses notes are a bit different in
+illustrate the numeric aspects.  These notes are a bit different in
 that `Julia` is primarily used for the numeric style of computing and
 the algebraic/symbolic treatment is added on. Doing the symbolic
 treatment by hand can be very beneficial while learning, and computer