X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=curriculum%2Fchallenge-bot.scm;h=710051d80d4f9abd4913171d5f990a14e3f2d164;hb=aa71ea448888570d0215ac15774f0405e53fd167;hp=f0a9893855f0de51334ea8b91a044ed4a2841fc1;hpb=6ef8240f15cda6ba6a57bf0346de42a52bb3f608;p=challenge-bot

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index f0a9893..710051d 100644
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -272,7 +272,19 @@
             furthest away from the first hole.
             then insert and tighten the screw as before.])))
    (subsection
-    :title [third and fourth hole and screw]))
+    :title [third and fourth hole and screw]
+    (p [even though the arduino is pretty well attached with just 2
+             screws, we will add a third and fourth.
+             this gives practice drilling and tightening screws.
+             it also keeps the arduino fixed even more rigidly.]))
+   (subsection
+    :title [assessment of arduino deck attachment]
+    (itemize
+     (item [you should now be able to grab the deck and shake it.
+                the arduino should stay firmly in place while you do.])
+     (item [the arduino should be close to but not touching an edge.])
+     (item [there should be no warping on the arduino.
+                  this could happen if the screws are too tight.]))))
   (section
    :title [breadboard])
   (section