diff --git a/index.html b/index.html
index a1a574a..7ca58dd 100644
--- a/index.html
+++ b/index.html
@@ -111,7 +111,7 @@
 <div><img src="images/osm.png"><a href="http://www.openstreetmap.org/">OpenStreetMap.org</a></div>
 <div><img src="images/google-map.png"><a href="https://www.google.com/maps/preview">maps.google.com</a></div>
 <div><img src="images/mapsdotstamen.png"><a href="http://maps.stamen.com">maps.stamen.com</a></div>
-<div><img src="images/iphone_maps.jpg">Making maps for <em>mobile devices</em> can be similar, but we're not talking about that today.</div> 
+<div><img src="images/iphone_maps.jpg">Making maps for <em>mobile devices</em> can be similar, but we're not talking about that today.</div>
 <div><img src="images/google-earth.png">We're also not talking about <em>digital globes</em> like <a href="http://www.google.com/earth/">Google Earth</a></div>
 <div><em>ok ok</em></div>
 <div>but how about a little history:<br><em>How did web maps come to be?</em></div>
@@ -200,8 +200,8 @@
 <div><img src="images/worldwide-wood.png"> <em>Pretty!</em></div>
 <div>Style your map with <a href="https://www.mapbox.com/carto">CartoCSS</a> (or just carto)</div>
 <div>You can host these files on <a href="https://www.mapbox.com/plans/">MapBox</a>, or...</div>
-<div>Serve the tiles by running your own tile server. For example: <a href="https://github.com/klokantech/tileserver-php/">TileServer.php</a> / <a href="http://tilestache.org">TileStache</a> / <a href="http://tilecache.org">TileCache</a> / <a href="https://github.com/mapbox/tilestream">TileStream</a> / <a href="https://github.com/chelm/mbtiles-server">mbtiles-server</a> / <a href=http://wiki.openstreetmap.org/wiki/Mod_tile">mod_tile</a></div>
-<div>See Eric Theise's <a href="http://erictheise.com/maptime_platform_slides">Geo Platform tutorial</a> for all the gritty details</div>
+<div>Serve the tiles by running your own tile server. For example: <a href="https://github.com/klokantech/tileserver-php/">TileServer.php</a> / <a href="http://tilestache.org">TileStache</a> / <a href="http://tilecache.org">TileCache</a> / <a href="https://github.com/mapbox/tilestream">TileStream</a> / <a href="https://github.com/chelm/mbtiles-server">mbtiles-server</a> / <a href="http://wiki.openstreetmap.org/wiki/Mod_tile">mod_tile</a></div>
+<div>See Eric Theise's <a href="https://erictheise.github.io/geostack-deck">Geo Platform tutorial</a> for all the gritty details</div>
 <div>Do I need a content layer?</div>
 <div>No? Put all your data into the tiles, possibly using UTFGrid for interactivity</div>
 <div>Yes? Convert a Shapefile to GeoJSON with <a href="http://ogre.adc4gis.com/">OGRE</a> or write your own GeoJSON with <a href="http://geojson.io">geojson.io</a></div>