diff --git a/source/_pages/atdc.md b/source/_pages/atdc.md
index 87be775e..b14e8e2f 100644
--- a/source/_pages/atdc.md
+++ b/source/_pages/atdc.md
@@ -6,7 +6,7 @@ title: Introduction to Automated Testing in Drupal email course
 
 Do you want to learn how to write automated tests and do test-driven development in Drupal?
 
-Register below for my free 7-day email course, during which you'll learn to write a new Drupal module from scratch with automated tests.
+Register below for my free 7-day email course, where you'll learn to write a new Drupal module from scratch with automated tests.
 
 Learn to test things like: