split first hole and first screw subsections

[challenge-bot] / curriculum / challenge-bot.scm

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 76dc7781a7133f338a04b10881f3e582af333956..9f613bf32c91f54072f0ea3bbe0886f1929f1c3a 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -10,7 +10,7 @@
    (subsection
     :title [arduino placement])
    (subsection
-    :title [first hole and screw]
+    :title [first hole]
     (subsubsection
      :title [choosing drill bit])
     (subsubsection
@@ -18,13 +18,33 @@
     (subsubsection
      :title [holding drill])
     (subsubsection
-     :title [drilling])
+     :title [drilling]))
+   (subsection
+    :title [first screw]
     (subsubsection
-     :title [6-32 by 3/8\" screw]
-     (p [the "6" part is how big around it is.])
-     (p [the "32" part is how close the threads are to each other.])
-     (p [the "head" is the flat part where some tool, like the alan
-             wrench, can exert force to spin the screw.]))
+     :title [fastening arduino to deck using ,(it [#6-32x3/8\"]) screw]
+     (p [the ",(it [#6])" part of ",(it [#6-32x3/8\"])" is how big
+             around the bolt is.  it is related to wire gauge.  bigger
+             numbers mean larger screw. smaller numbers means smaller
+             screws.])
+     (p [,(bold [check])
+         ,(itemize
+           (item
+            [in the motor assembly, there are ,(it [#4-40x1.25\"])
+                screws.  are those fatter, thinner, or the same
+                thickness as the ,(it [#6-32x3/8\"]) screws?]))])
+     (p [the ,(it [32]) part 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 ,(it [pitch]).  it is a count
+             of how many times the thread wraps around one inch of the
+             screw body.])
+     (p [the ,(it [head]) is the flat part where some tool, like the
+             alan wrench, can exert force to spin the screw.])
+     (p [,(bold [check])
+         ,(itemize
+           (item [how many times will the thread wrap around the
+                      one inch of the screw body?])
+           (item [what about 2 inches?]))]))
     (subsubsection
      :title [fasten the arduino board to the deck]
      (p [push the 6-32 screw into the deck from the underside and at the