diff --git a/class1.html b/class1.html
index fb8a35a..50233f5 100644
--- a/class1.html
+++ b/class1.html
@@ -278,37 +278,6 @@ <h3>Data types - continued ...</h3>
 
       </section>
 
-      <!-- STATEMENTS & ERRORS -->
-      <section>
-        <section>
-            <h3>Errors</h3>
-            <ul class="list--tall copy--small box--small">
-                <li class="fragment">There are different kinds of errors that can occur.<br/><small>We've seen a few already.</small></li>
-                <li class="fragment">A "runtime error" results in an <strong>Exception</strong>, which has several types.<br/><small>Each type gives us some information about the nature of the error and how to correct it</small></li>
-                <li class="fragment">One type of exception is a <strong>SyntaxError</strong>. This results when our <span class="red">code can not be evaluated because it is incorrect</span> at a syntactic level.<br/><small>In other words, we are not following the "rules" of the language.</small></li>
-                <li class="fragment">Some other examples are the <strong>TypeError</strong> and <strong>NameError</strong> exceptions.</li>
-            </ul>
-        </section>
-
-        <section>
-          <h3>Errors - continued ...</h3>
-          <div class="box--small"><pre><code contenteditable class="python">
-# SyntaxError - Doesn't conform to the rules of Python.
-# This statement isn't meaningful to the computer
-4spam)eggs(garbage) + 10
-
-# NameError - Using a name that hasn't been defined yet
-a = 5
-print(d)
-d = 10
-
-# TypeError - Using an object in a way that its type does not support
-'string1' - 'string2'
-          </code></pre></div>
-          <p class="copy--small">There are also <strong>semantic</strong> errors.<br/><small>These are harder to catch because the computer can't catch them for us.</small></p>
-        </section>
-      </section>
-
       <!-- Let's develop it: 10 minutes -->
       <section>
           <h3>Let's Develop It</h3>
@@ -442,7 +411,7 @@ <h3>Homework</h3>
         <section>
           <h3>Want help?</h3>
           <div class="box">
-            <p class="box"><a href="https://gdiaa.slack.com/messages/0516-intro-python/details/" target="_blank" class="roll"><span>#0516-intro-python</span></a></p>
+            <p class="box"><a href="https://gdiaa.slack.com/messages/C8PGD0VFE" target="_blank" class="roll"><span>#0118-intro-python</span></a></p>
             <p><small>Not on Slack? <a target="_blank" href="http://bit.ly/gdiaa-slack" class="roll"><span data-title="bit.ly/gdiaa-slack">bit.ly/gdiaa-slack</span></a></small></p>
           </div>
         </section>
diff --git a/class2.html b/class2.html
index 991b5c6..403beae 100644
--- a/class2.html
+++ b/class2.html
@@ -172,20 +172,6 @@ <h3>Chained conditionals</h3>
             </code></pre></div>
         </section>
 
-        <section>
-            <h3>Nested conditionals</h3>
-            <p class="box--small copy--small">Conditionals can also be <strong>nested</strong></p>
-            <div class="fragment"><p class="box--small copy--small">Nested conditionals occur inside of other conditionals and are indented over once more.</p><p class="box--small copy--small">When the code block is complete, they are unindented</p>
-                        <pre><code contenteditable class="small python">
-            if x > 5:
-                print('x is greater than 5')
-                if x > 10:
-                    print('...it is also greater than 10')
-                print('Done evaluating the x > 10 block')
-            print('Done evaluating the x > 5 block')
-                        </code></pre></div>
-        </section>
-
         <!-- Let's develop it: 10 minutes -->
         <section>
             <h3>Let's Develop It</h3>
@@ -497,19 +483,10 @@ <h3>Optional Function Practice</h3>
           </code></pre>
         </section>
 
-        <section>
-          <h3>Boolean Practice</h3>
-
-          <p>Do this excercise from Learn Python The Hard Way</p>
-          <i>Make sure to do these problems by hand, not with python! </i>
-
-          <h6><a href="http://learnpythonthehardway.org/book/ex28.html">http://learnpythonthehardway.org/book/ex28.html</a></h6>
-        </section>
-
         <section>
           <h3>Want help?</h3>
           <div class="box">
-            <p class="box"><a href="https://gdiaa.slack.com/messages/0516-intro-python/details/" target="_blank" class="roll"><span>#0516-intro-python</span></a></p>
+            <p class="box"><a href="https://gdiaa.slack.com/messages/C8PGD0VFE" target="_blank" class="roll"><span>#0118-intro-python</span></a></p>
             <p><small>Not on Slack? <a target="_blank" href="http://bit.ly/gdiaa-slack" class="roll"><span data-title="bit.ly/gdiaa-slack">bit.ly/gdiaa-slack</span></a></small></p>
           </div>
         </section>
diff --git a/class3.html b/class3.html
index 0f4c8d4..b1e7d08 100644
--- a/class3.html
+++ b/class3.html
@@ -447,7 +447,7 @@ <h3>Homework</h3>
         <section>
           <h3>Want help?</h3>
           <div class="box">
-            <p class="box"><a href="https://gdiaa.slack.com/messages/0516-intro-python/details/" target="_blank" class="roll"><span>#0516-intro-python</span></a></p>
+            <p class="box"><a href="https://gdiaa.slack.com/messages/C8PGD0VFE" target="_blank" class="roll"><span>#0118-intro-python</span></a></p>
             <p><small>Not on Slack? <a target="_blank" href="http://bit.ly/gdiaa-slack" class="roll"><span data-title="bit.ly/gdiaa-slack">bit.ly/gdiaa-slack</span></a></small></p>
           </div>
         </section>
diff --git a/class4.html b/class4.html
index 85747cc..9fd1ba2 100644
--- a/class4.html
+++ b/class4.html
@@ -326,7 +326,7 @@ <h3>Questions?</h3>
         <section>
           <h3>Wanna chat Python?</h3>
           <div class="box">
-            <p class="box"><a href="https://gdiaa.slack.com/messages/python/details/" target="_blank" class="roll"><span>#python</span></a></p>
+            <p class="box"><a href="https://gdiaa.slack.com/messages/C04MVD89X" target="_blank" class="roll"><span>#python</span></a></p>
             <p><small>Not on Slack? <a target="_blank" href="http://bit.ly/gdiaa-slack" class="roll"><span data-title="bit.ly/gdiaa-slack">bit.ly/gdiaa-slack</span></a></small></p>
           </div>
         </section>