diff --git a/collects/scribblings/htdp-langs/advanced.scrbl b/collects/scribblings/htdp-langs/advanced.scrbl
index 9140226f78..56e6b95315 100644
--- a/collects/scribblings/htdp-langs/advanced.scrbl
+++ b/collects/scribblings/htdp-langs/advanced.scrbl
@@ -53,6 +53,7 @@
       (code:line @#,elem{@racketvalfont{'}@racket[_quoted]})
       (code:line @#,elem{@racketvalfont{`}@racket[_quasiquoted]})
       number
+      boolean
       string
       character]
 [choice (code:line name)
diff --git a/collects/scribblings/htdp-langs/beginner-abbr.scrbl b/collects/scribblings/htdp-langs/beginner-abbr.scrbl
index 16fed41a24..2d8ada1a58 100644
--- a/collects/scribblings/htdp-langs/beginner-abbr.scrbl
+++ b/collects/scribblings/htdp-langs/beginner-abbr.scrbl
@@ -32,6 +32,7 @@
       (code:line @#,elem{@racketvalfont{'}@racket[_quoted]})
       (code:line @#,elem{@racketvalfont{`}@racket[_quasiquoted]})
       number
+      boolean	
       string
       character]
 ]
diff --git a/collects/scribblings/htdp-langs/beginner.scrbl b/collects/scribblings/htdp-langs/beginner.scrbl
index 19440f87be..67c71d1e27 100644
--- a/collects/scribblings/htdp-langs/beginner.scrbl
+++ b/collects/scribblings/htdp-langs/beginner.scrbl
@@ -29,6 +29,7 @@
       name
       (code:line @#,elem{@racketvalfont{'}@racket[name]})
       number
+      boolean 
       string
       character]
 ]
diff --git a/collects/scribblings/htdp-langs/intermediate-lambda.scrbl b/collects/scribblings/htdp-langs/intermediate-lambda.scrbl
index 99827f5110..b54ed73902 100644
--- a/collects/scribblings/htdp-langs/intermediate-lambda.scrbl
+++ b/collects/scribblings/htdp-langs/intermediate-lambda.scrbl
@@ -36,6 +36,7 @@
       (code:line @#,elem{@racketvalfont{'}@racket[_quoted]})
       (code:line @#,elem{@racketvalfont{`}@racket[_quasiquoted]})
       number
+      boolean 
       string
       character]
 ]
diff --git a/collects/scribblings/htdp-langs/intermediate.scrbl b/collects/scribblings/htdp-langs/intermediate.scrbl
index 542f78084e..089234297a 100644
--- a/collects/scribblings/htdp-langs/intermediate.scrbl
+++ b/collects/scribblings/htdp-langs/intermediate.scrbl
@@ -35,6 +35,7 @@
       (code:line @#,elem{@racketvalfont{'}@racket[_quoted]})
       (code:line @#,elem{@racketvalfont{`}@racket[_quasiquoted]})
       number
+      boolean 
       string
       character]
 [expr-for-let (lambda (variable variable ...) expr)
diff --git a/collects/scribblings/htdp-langs/std-grammar.rkt b/collects/scribblings/htdp-langs/std-grammar.rkt
index 1c891c8b7e..e25295d549 100644
--- a/collects/scribblings/htdp-langs/std-grammar.rkt
+++ b/collects/scribblings/htdp-langs/std-grammar.rkt
@@ -74,6 +74,9 @@ not including a space or one of the following:}
 @t{A @racket[_number] is a number such as @racket[123], @racket[3/2], or
 @racket[5.5].}
 
+@t{A @racket[_boolean] is one of: @racket[true], @racket[false],
+@racket[#t], @racket[#f], @code{#true}, or @code{#false}.}
+
 @t{A @racket[_symbol] is a quote character followed by a name. A
 symbol is a value, just like 0 or empty.}