diff --git a/README.md b/README.md
index 9ef4415..c848259 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,8 @@ weekly [CSSS seminar series](https://csss.uw.edu/seminars) at the
 a set number of those seminars to get credit.
 
 The script reads the weekly attendance export that the [Canvas Roll
-Call](FIXME) tool emails you, cross-references it against the live Canvas
+Call](https://community.instructure.com/en/kb/articles/662770-what-is-the-roll-call-attendance-tool)
+tool emails you, cross-references it against the live Canvas
 enrollment, and sends warning DMs through the Canvas Conversations API.
 A small Python script writes a short note to each student—scoped to
 the course—in the same language you would have written yourself.
@@ -50,8 +51,9 @@ quarter, annotated with the warning dates from the contact log.
   library, which appeared in 3.11).
 - The `requests` library (`pip install requests` or `apt install
   python3-requests`). Everything else is in the stdlib.
-- A Canvas instance with the Roll Call (Attendance) LTI tool and
-  personal API access enabled for you as the instructor.
+- A Canvas instance with the
+  [Roll Call (Attendance) LTI tool](https://community.instructure.com/en/kb/articles/662770-what-is-the-roll-call-attendance-tool)
+  and personal API access enabled for you as the instructor.
 
 ## Setup