diff --git a/instruction/deliverable8Metrics/deliverable8Metrics.md b/instruction/deliverable8Metrics/deliverable8Metrics.md
index 899bdb1..6619c06 100644
--- a/instruction/deliverable8Metrics/deliverable8Metrics.md
+++ b/instruction/deliverable8Metrics/deliverable8Metrics.md
@@ -256,12 +256,17 @@ Once this is all working you should have something like this:
 
 ![Metric dashboard](metricDashboard.png)
 
-Get the [public URL](../deliverable8Metrics/deliverable8Metrics.md#make-your-dashboard-public) for your dashboard and submit it to the Canvas assignment. This should look something like this:
-
+Get the [public URL](../deliverable8Metrics/deliverable8Metrics.md#make-your-dashboard-public) for your dashboard and submit it to the Canvas assignment. Your URL **must include a specific time range** showing a window when your metrics were actively recording data. To get this URL, set the dashboard time range to a period with nonzero data, then copy the full URL from your browser's address bar — it will include `from` and `to` query parameters. This allows the TAs to verify your metrics at the exact time they were generated.
+ 
+The submitted URL should look something like this:
+ 
 ```txt
-https://youraccounthere.grafana.net/public-dashboards/29305se9fsacc66a21fa91899b75734
+https://youraccounthere.grafana.net/public-dashboards/29305se9fsacc66a21fa91899b75734?from=2026-03-26T19:09:00.000Z&to=2026-03-26T19:14:00.000Z&timezone=browser
 ```
-
+ 
+> [!IMPORTANT]
+>
+> A URL without a time range will **not** be accepted. Make sure you test your time-ranged URL in an incognito window before submitting. If the TA cannot see nonzero data in the specified window, your submission will be rejected.
 ### Rubric
 
 | Percent | Item                                                                          |