diff --git a/db/teaching/cse4_562/2018sp/schedule.json b/db/teaching/cse4_562/2018sp/schedule.json
index 3a7d1c22..592f165c 100644
--- a/db/teaching/cse4_562/2018sp/schedule.json
+++ b/db/teaching/cse4_562/2018sp/schedule.json
@@ -84,6 +84,7 @@
     "due": "",
     "topic": "Evaluating Relational Algebra",
     "materials": {
+    	"slides": "https://odin.cse.buffalo.edu/slides/cse4562sp2018/2018-02-16-EvaluatingRA.pdf"
     }
   },
   {
diff --git a/slides/cse4562sp2018/2018-02-16-EvaluatingRA.pdf b/slides/cse4562sp2018/2018-02-16-EvaluatingRA.pdf
new file mode 100644
index 00000000..33286293
Binary files /dev/null and b/slides/cse4562sp2018/2018-02-16-EvaluatingRA.pdf differ