diff --git a/src/arrays/challenges.md b/src/arrays/challenges.md
index c210ab0..48c2d91 100644
--- a/src/arrays/challenges.md
+++ b/src/arrays/challenges.md
@@ -13,7 +13,7 @@ Edit the following program so that the output is zero.
 void main() {
     // Only change this line
     String[] words = { "Sam", "I", "Am" };
-    System.out.println(array.length);
+    IO.println(words.length);
 }
 ```
 
diff --git a/src/arrays/reassignment.md b/src/arrays/reassignment.md
index 2b09a02..834d93b 100644
--- a/src/arrays/reassignment.md
+++ b/src/arrays/reassignment.md
@@ -20,7 +20,7 @@ System.out.println(numbers.length);
 ~}
 ```
 
-This reassignment will not be affect any variables which
+This reassignment will not affect any variables which
 are aliases for the variable's old value.
 
 ```java
diff --git a/src/arrays/relation_to_final_variables.md b/src/arrays/relation_to_final_variables.md
index 3472c8b..4d606a1 100644
--- a/src/arrays/relation_to_final_variables.md
+++ b/src/arrays/relation_to_final_variables.md
@@ -12,7 +12,7 @@ final char[] catchphrase = { 'w', 'o', 'a', 'h', '!' };
 System.out.println(catchphrase);
 
 // Cannot reassign
-// catchphrase = { 'e', 'g', 'a', 'd', 's' }
+// catchphrase = new char[] { 'e', 'g', 'a', 'd', 's' }
 // but can set elements directly
 catchphrase[0] = 'e';
 catchphrase[1] = 'g';
diff --git a/src/loops_ii/comparison_to_while.md b/src/loops_ii/comparison_to_while.md
index 5877ab9..b8dfb11 100644
--- a/src/loops_ii/comparison_to_while.md
+++ b/src/loops_ii/comparison_to_while.md
@@ -54,7 +54,7 @@ while (index < numbers.length) {
 ~}
 ```
 
-Us humans, with our tiny monkey brains, can get very lost when things that are related to eachother are separated
+Us humans, with our tiny monkey brains, can get very lost when things that are related to each other are separated
 by long distances.
 
 In this dimension, for loops are superior. All the bits of code that "control the loop" can be right at the top.