diff --git a/db/teaching/cse4_562/2018sp/schedule.json b/db/teaching/cse4_562/2018sp/schedule.json
index d345676e..a57a4b4c 100644
--- a/db/teaching/cse4_562/2018sp/schedule.json
+++ b/db/teaching/cse4_562/2018sp/schedule.json
@@ -360,6 +360,7 @@
     "due": "",
     "topic": "Precomputation",
     "materials": {
+    	"slides" : "https://odin.cse.buffalo.edu/slides/cse4562sp2018/2018-04-27-Precomputation.pdf"
     }
   },
   {
diff --git a/slides/cse4562sp2018/2018-04-27-Precomputation.pdf b/slides/cse4562sp2018/2018-04-27-Precomputation.pdf
new file mode 100644
index 00000000..c4c5c5ee
Binary files /dev/null and b/slides/cse4562sp2018/2018-04-27-Precomputation.pdf differ