diff --git a/notebooks/appA.ipynb b/notebooks/appA.ipynb
index 0b5d4d70..50e14a25 100644
--- a/notebooks/appA.ipynb
+++ b/notebooks/appA.ipynb
@@ -666,7 +666,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "**Exercise:** Go back and run `run_timing_test` with a larger value of `max_time` and see if the run time converges to the line with slope 2.  Just be careful not to make `max_time` to big."
+    "**Exercise:** Go back and run `run_timing_test` with a larger value of `max_time` and see if the run time converges to the line with slope 2.  Just be careful not to make `max_time` too big."
    ]
   },
   {
diff --git a/notebooks/chap02.ipynb b/notebooks/chap02.ipynb
index 1ef73a29..a9dfdfb6 100644
--- a/notebooks/chap02.ipynb
+++ b/notebooks/chap02.ipynb
@@ -156,7 +156,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We can use the keys in `pos` to add nodes to the graph."
+    "We can use the keys in `positions` to add nodes to the graph."
    ]
   },
   {
@@ -332,7 +332,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The `neighbors` method the neighbors for a given node."
+    "The `neighbors` method returns the neighbors for a given node."
    ]
   },
   {
@@ -348,7 +348,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "**Exercise:** Make and draw complete directed graph with 5 nodes."
+    "**Exercise:** Make and draw a complete directed graph with 5 nodes."
    ]
   },
   {
@@ -789,7 +789,7 @@
     "analysis, what is the order of growth for `is_connected`?\n",
     "\n",
     "    def is_connected(G):\n",
-    "        start = list(G)[0]\n",
+    "        start = start = next(G.nodes_iter())\n",
     "        reachable = reachable_nodes(G, start)\n",
     "        return len(reachable) == len(G)"
    ]