diff --git a/content/pages/schedule.csv b/content/pages/schedule.csv
index 0946a45..02f5dc8 100644
--- a/content/pages/schedule.csv
+++ b/content/pages/schedule.csv
@@ -4,7 +4,7 @@ Lecture #,Date,Topic,Assignment Due,Materials
 - 1.1 Introduction & Problem Example
 - 1.2 Vocareum
 - 1.3 Jupyter & Python Introduction
-- 1.4 SymPy Introduction",,"- `Slides 1.1 <https://docs.google.com/presentation/d/e/2PACX-1vSmOhn3EdXCUXK0VAOjwpeUKN4mReO71JZLWuEZrDlzkk8BSwQm-84kQ3QEHnF35a7bqWiEhJzdQ8vU/pub?start=false&loop=false&delayms=3000>`__
+- 1.4 SymPy Introduction",,"- `Slides 1.1`_
 - `Video 1.1 (from 2023) <https://youtu.be/ljmuyXz5FN8>`_ [31m]
 - `Notebook 1.1 <https://pydy.readthedocs.io/en/latest/examples/chaos-pendulum.html>`_
 - `Video 1.2 <https://youtu.be/oWbMPdAdpWA>`_ [8m]
diff --git a/content/pages/schedule.rst b/content/pages/schedule.rst
index 4bea83d..3007616 100644
--- a/content/pages/schedule.rst
+++ b/content/pages/schedule.rst
@@ -61,8 +61,7 @@ The basic flow of the course is as follows:
 .. _Video 14: https://youtu.be/oNJedzSl-Bo
 .. _Video 15: https://youtu.be/wk4kwgLJvd0
 
-.. _Slides 1.1: https://docs.google.com/presentation/d/e/2PACX-1vRMmKQx8-vu9BNjQZLkfZd-n5HPGG6xzG6FBI9ke99L1WKzl69oTiSPOC2YSkJ8FmAiNYt4-NlJD5Hc/pub?start=false&loop=false&delayms=3000
-.. _Slides 1.1 PDF: https://moorepants.info/mechmotum-bucket/me41055-2022-intro-slides.pdf
+.. _Slides 1.1: https://tinyurl.com/multibody-2025-intro
 
 .. ?flush_cache=True to try to get nbviewer working