X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=curriculum%2Fchallenge-bot.scm;h=22aef740fa748d3a4d4ae8df7747c59ab94bf2c2;hb=5747a610b74d8613a9d1c51ae5fcb1bbc154515e;hp=2ebd03481528a8901033e6cedd87a1cec6968d41;hpb=8fe23b941c43db87e4d39f52e76ac1f3c164471f;p=challenge-bot

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 2ebd034..22aef74 100644
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -111,18 +111,56 @@
             [why not place the arduino up along the left side of the
                  robot?]))]))
     (subsubsection
-     :title [drilling]
-     (p [place the drill bit in position.
-               brint the drill up to full speed, and keep it full speed.
-               push down until the drill bit has passed through the
-               deck.
-               keep the drill at full speed.
-               stop before the drill smashes into the arduino.
-               keep the drill at full speed by holding the trigger.
-               bring the drill straight back up.
-               hold the trigger down to keep the drill at full speed.
-               once the drill is back out of the hole, let go of the
-               trigger.])
+     :title [drilling practice]
+     (p [strength check]
+        (itemize
+         (item [put on safety goggles])
+         (item [unplug drill])
+         (item [hold drill in one hand])
+         (item [point drill at the ground])
+         (item [point drill at the wall])))
+     (p [steps for drilling into wood block]
+        (itemize
+         (item [plug in the drill])
+         (item [place the drill bit in position])
+         (item [bring the drill up to full speed, and keep it at full
+                      speed while lowering and raising the drill])
+         (item [push down until the drill bit has passed through an inch
+                     of the wood block])
+         (item [keep the drill at full speed])
+         (item [stop before the drill smashes into the wood block])
+         (item [keep the drill at full speed by holding the trigger])
+         (item [bring the drill straight back up])
+         (item [hold the trigger down to keep the drill at full speed])
+         (item [once the drill is back out of the hole, let go of the
+                     trigger])))
+     (p [check
+         ,(itemize
+           (item
+            [should the drill be at full speed while the drill bit is
+                    going down into the wood and coming back up?])
+           (item
+            [how do you keep the drill at full speed?])
+           (item
+            [what would happen if the drill bit were not at full
+                  speed?])
+           (item
+            [what would happen if the drill were twisted sideways while
+                  the drill bit were in the wood?]))]))
+    (subsubsection
+     :title [drilling the first screw hole]
+     (itemize
+      (item [place the drill bit in position])
+      (item [bring the drill up to full speed, and keep it full speed])
+      (item [push down until the drill bit has passed through the
+                  deck])
+      (item [keep the drill at full speed])
+      (item [stop before the drill smashes into the arduino])
+      (item [keep the drill at full speed by holding the trigger])
+      (item [bring the drill straight back up])
+      (item [hold the trigger down to keep the drill at full speed])
+      (item [once the drill is back out of the hole, let go of the
+                  trigger]))
      (p [check
          ,(itemize
            (item
@@ -139,7 +177,7 @@
      :title [fastening arduino to deck using #6-32x3/8\" screw]
      (p [the "#6" part of "#6-32x3/8\"" is how big around the bolt is.
              it is related to wire gauge.
-             bigger numbers mean larger screw.
+             bigger numbers mean larger screws.
              smaller numbers means smaller screws.]
         (figure :legend "arduino to deck / #6-32 screw"
                 (image :file
@@ -150,8 +188,8 @@
             [in the motor assembly, there are #4-40x1.25\" screws.
                 are those fatter, thinner, or the same thickness as the
                 #6-32x3/8\" screws?]))])
-     (p [the "32" part is a measurement of how close the threads are to
-             each other.
+     (p [the "32" part of "#6-32x3/8\"" is a measurement of how close
+             the threads are to each other.
              this is related to the angle of the thread, which is also
              called pitch.
              it is a count of how many times the thread wraps around one