diff --git a/2016-10-16-lecture09.md b/2016-10-16-lecture09.md
index 43adbbe..158968e 100644
--- a/2016-10-16-lecture09.md
+++ b/2016-10-16-lecture09.md
@@ -422,7 +422,7 @@ Note:
 
 ## Lateral inhibition to make discreet borders 
 
-<div><img src="figs/image6_dbace8a.png" height="100px"><figcaption></figcaption></div>
+<div><img src="figs/image6_dbace8a.jpg" height="100px"><figcaption></figcaption></div>
 
  -->
 
diff --git a/2016-11-03-extra.md b/2016-11-03-extra.md
index 2d426b4..3120673 100644
--- a/2016-11-03-extra.md
+++ b/2016-11-03-extra.md
@@ -65,7 +65,8 @@ dLGN,
 visual cortex
 
 
-<div><img src="figs/droppedImage1_951ed66.pdf" height="100px"><figcaption></figcaption></div>
+<figure><img src="figs/Hubel1988_951ed66_7488b72.jpg" height="100px"><figcaption>Visual pathways, Hubel 1988</figcaption></figure>
+
 
 <div><img src="figs/retinotopic_mapping_80f68b4.jpg" height="100px"><figcaption></figcaption></div>
 
@@ -199,9 +200,9 @@ Orientation
 
 selectivity
 
-<div><img src="figs/kandelschwartz-fig27-17_3d15d30.pdf" height="100px"><figcaption></figcaption></div>
+<div><img src="figs/kandelschwartz-fig27-17_3d15d30.jpg" height="100px"><figcaption></figcaption></div>
 
-<div><img src="figs/kandelschwartz-fig27-14_e52cde6.pdf" height="100px"><figcaption></figcaption></div>
+<div><img src="figs/kandelschwartz-fig27-14_e52cde6.jpg" height="100px"><figcaption></figcaption></div>
 
 Note:
 
diff --git a/2016-11-14-lecture15.md b/2016-11-14-lecture15.md
index 1286e63..52d06fc 100644
--- a/2016-11-14-lecture15.md
+++ b/2016-11-14-lecture15.md
@@ -199,7 +199,7 @@ colliculo- or tectospinal tract. There are actually both crossed and uncrossed t
 <!-- 
 TODO: This summary drawing should be reworked as there are errors on it
 The medial descending motor pathways
-<div><img src="tmp/image_d920d94.pdf" height="100px"><figcaption></figcaption></div>
+<div><img src="tmp/image_d920d94.jpg" height="100px"><figcaption></figcaption></div>
 
  -->
 
diff --git a/2016-11-25-lecture18.md b/2016-11-25-lecture18.md
index 4710b3b..717c54a 100644
--- a/2016-11-25-lecture18.md
+++ b/2016-11-25-lecture18.md
@@ -726,5 +726,5 @@ Note:
 
 ## Exam bonus points!
 
-5 bonus points on the final exam for every person if <span style="color:red">**≥51%** of the class submits teaching evaluations</span> (for myself and TAs) by Thursday Dec 8
+5 bonus points on the final exam for every person if <span style="color:red">**≥51%** of the class submits teaching evaluations</span> (for myself and TAs) by <del>Thursday Dec 8</del> <ins> **Sun Dec 4**</ins> (apparently there is some sort of evaluation window/deadline that ends earlier than expected, sorry for the confusion!)
 
diff --git a/2016-11-26-lecture17.md b/2016-11-26-lecture17.md
index 38c6c37..3916a01 100644
--- a/2016-11-26-lecture17.md
+++ b/2016-11-26-lecture17.md
@@ -356,7 +356,7 @@ Note:
 
 ## Spike-timing dependent plasticity (STDP)
 
-<div style="height:250px"><img src="figs/Neuroscience5e-Fig-08.18-1R_copy_a2ed25f.jpg" height="200px"><figcaption>Neuroscience 5e Fig. 8.18, Bi and Poo *J Neurosci* 1998</figcaption></div>
+<div style="height:250px;"><img src="figs/Neuroscience5e-Fig-08.18-1R_copy_a2ed25f.jpg" height="200px"><figcaption>Neuroscience 5e Fig. 8.18, Bi and Poo *J Neurosci* 1998</figcaption></div>
 <div><img src="figs/Neuroscience5e-Fig-08.18-2R_copy_c76cb60.jpg" height="200px"><figcaption>Neuroscience 5e Fig. 8.18, Bi and Poo *J Neurosci* 1998</figcaption></div>
 
 Note: