X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=curriculum%2Fchallenge-bot.scm;h=15ea4e00f96688f15b856dac3faf8d649757ac1b;hb=543ad3c25d443343eca926e7e3ed6b325f9ec6ba;hp=e1e942240690b0738beb4618ebf61dd95b584441;hpb=23045a14179a47ef426971376013bd42a2191214;p=challenge-bot

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index e1e9422..15ea4e0 100644
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -48,7 +48,15 @@
      (p [here's a cross section of a screw in the deck]
         (figure :legend "screw cross section"
                 (image :file
-                       "arduino-to-deck/screw-cross-section.png"))))
+                       "arduino-to-deck/screw-cross-section.png")))
+     (p [check
+         ,(itemize
+           (item
+            [what would happen if the drill bit were larger than the
+                  screw thread?])
+           (item
+            [what would happen if the drill bit were smaller than the
+                  screw body?]))]))
     (subsubsection
      :title [inserting drill bit]
      (p (figure :legend "arduino to deck / insert bit"
@@ -62,7 +70,14 @@
         [while holding the drill bit, twist end of the drill to tighten
                the teeth.
                make sure that the teeth end up gripping the flat part of
-               the drill bit.]))
+               the drill bit.])
+     (p [check
+         ,(itemize
+           (item
+            [where should the teeth clamp down on the drill bit?])
+           (item
+            [what would happen if the teeth tightened on the recessed
+                  part of the drill bit?]))]))
     (subsubsection
      :title [holding drill]
      (p [hold the drill with one hand on the handle and trigger.
@@ -85,7 +100,16 @@
              the green circle shows where the hole is.
              the blue box encloses the arduino hole and two deck holes.
              place the arduino hole mid-way between the two
-             deck holes.]))
+             deck holes.])
+     (p [check
+         ,(itemize
+           (item
+            [should the arduino be upside-down?])
+           (item
+            [what should the upper side of the arduino align with?])
+           (item
+            [why not place the arduino up along the left side of the
+                 robot?]))]))
     (subsubsection
      :title [drilling]))
    (subsection