diff --git a/tibble.Rmd b/tibble.Rmd
index 4d942ad..dd1815e 100644
--- a/tibble.Rmd
+++ b/tibble.Rmd
@@ -67,7 +67,7 @@ I often add a comment (the line starting with `#`), to make it really clear wher
 
 ## Tibbles vs. data frames
 
-There are two main differences in the usage of a data frame vs a tibble: printing, and subsetting.
+There are two main differences in the usage of a data frame vs a tibble: printing and subsetting.
 
 ### Printing
 
@@ -83,7 +83,7 @@ tibble(
 )
 ```
 
-Tibbles are designed so that you don't accidentally overwhelm your console when you print large dataframes. But sometimes you need more output than the default display. There are a few options that can help.
+Tibbles are designed so that you don't accidentally overwhelm your console when you print large data frames. But sometimes you need more output than the default display. There are a few options that can help.
 
 First, you can explicitly `print()` the data frame and control the number of rows (`n`) and the `width` of the display. `width = Inf` will display all columns:
 
@@ -112,7 +112,7 @@ nycflights13::flights %>%
 
 ### Subsetting
 
-So far all the tools you've learned have worked with complete dataframes. If you want to pull out a single variable, you need some new tools, `$` and `[[`. `[[` can extract by name or position; `$` only extracts by name but is a little less typing.
+So far all the tools you've learned have worked with complete data frames. If you want to pull out a single variable, you need some new tools, `$` and `[[`. `[[` can extract by name or position; `$` only extracts by name but is a little less typing.
 
 ```{r}
 df <- tibble(