Fix Typo

bredesign/source/index.html.erb

@@ -125,7 +125,7 @@
     <p>Your code will rarely contain free-floating literals, of course, since
       they don't actually <em>do</em> anything on their own. Instead, you'll use
       literals in operations. Operations are how you <em>do things</em>. All
-      operations take the form, "opening parthensis, operator, operands,
+      operations take the form, "opening parenthesis, operator, operands,
       closing parenthesis":</p>
     <div class="code pygments"><div class="highlight"><pre><span class="p">(</span><span class="nf">operator</span> <span class="nv">operand1</span> <span class="nv">operand2</span> <span class="nv">...</span> <span class="nv">operandn</span><span class="p">)</span></pre></div></div>
     <p>Notice that there are no commas. Clojure uses whitespace to separate

content/do-things.md

@@ -55,7 +55,7 @@ literal representations are all valid forms:
 Your code will rarely contain free-floating literals, of course, since
 they don't actually *do* anything on their own. Instead, you'll use
 literals in operations. Operations are how you *do things*. All
-operations take the form, "opening parthensis, operator, operands,
+operations take the form, "opening parenthesis, operator, operands,
 closing parenthesis":
 
 ```clojure

content/functional-programming.md

@@ -141,7 +141,7 @@ perform them, which lets you put them on autopilot.
 ### Pure Functions Have No Side Effects
 
 To perform a side effect is to change the association between a name
-and its value within a given scope. For example, in Javscript:
+and its value within a given scope. For example, in Javascript:
 
 ```javascript
 var haplessObject = {