diff --git a/transform.Rmd b/transform.Rmd
index 950c9f5..ff86d13 100644
--- a/transform.Rmd
+++ b/transform.Rmd
@@ -394,7 +394,7 @@ This function works similarly to the `select` argument in `base::subset()`. Beca
 
 --------------------------------------------------------------------------------
 
-### Exericses
+### Exercises
 
 1.  Brainstorm as many ways as possible to select `dep_time`, `dep_delay`,
     `arr_time`, and `arr_delay` from `flights`.
@@ -534,7 +534,7 @@ ggplot(flights, aes(air_time - airtime2)) + geom_histogram()
 
 1.  Currently `dep_time()` and `arr_time()` are convenient to look at, but
     hard to compute with because they're not really continuous numbers. 
-    Convert them to a more convenient represention of number of minutes
+    Convert them to a more convenient representation of number of minutes
     since midnight.
     
 1.  Compute the scheduled time by adding `dep_delay` to `dep_time`. Plot