diff --git a/transform.Rmd b/transform.Rmd
index 049fc92..ff86d13 100644
--- a/transform.Rmd
+++ b/transform.Rmd
@@ -394,7 +394,7 @@ This function works similarly to the `select` argument in `base::subset()`. Beca
 
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-### Exericses
+### Exercises
 
 1.  Brainstorm as many ways as possible to select `dep_time`, `dep_delay`,
     `arr_time`, and `arr_delay` from `flights`.