diff --git a/config/.eslintignore b/.eslintignore
similarity index 83%
rename from config/.eslintignore
rename to .eslintignore
index 05b1cf3..82ff623 100644
--- a/config/.eslintignore
+++ b/.eslintignore
@@ -2,4 +2,4 @@
 **/vendor/*
 **/*.min.js
 **/coverage/*
-**/build/*
+**/build/*
\ No newline at end of file
diff --git a/config/.eslintrc.json b/.eslintrc.json
similarity index 99%
rename from config/.eslintrc.json
rename to .eslintrc.json
index 886827f..b96d606 100644
--- a/config/.eslintrc.json
+++ b/.eslintrc.json
@@ -24,4 +24,4 @@
     "semi": [ "error", "always" ],
     "linebreak-style": ["error", "unix"]
   }
-}
+}
\ No newline at end of file
diff --git a/config/.gitignore b/.gitignore
similarity index 99%
rename from config/.gitignore
rename to .gitignore
index 4745950..e24c600 100644
--- a/config/.gitignore
+++ b/.gitignore
@@ -142,4 +142,4 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
-# End of https://www.gitignore.io/api/vim,osx,node,linux,windows
+# End of https://www.gitignore.io/api/vim,osx,node,linux,windows
\ No newline at end of file
diff --git a/CHALLENGE.md b/CHALLENGE.md
deleted file mode 100644
index 099aac4..0000000
--- a/CHALLENGE.md
+++ /dev/null
@@ -1,20 +0,0 @@
-![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) 01: Whiteboard Challenge
-===
-
-## Requirements
-Write a function that takes in a numeric array and returns an object literal with three properties:
-* the highest value
-* the lowest value
-* the average of all values
-
-## Submission Instructions
-
-1. With your assigned partner, pseudocode your solution on the whiteboard. Take a picture of your proposed solution for your repo.
-1. Make a new branch and folder in your whiteboard challenge repository on GitHub. The name of the folder should be the same as the name of the challenge.
-1. This folder should contain:
-	- A file named `solution.js` which contains the JavaScript solution
-	- A picture of your pseudocoded solution from the whiteboarding exercise
-	- A `README.md` which includes the problem domain
-1. Complete the whiteboard challenge in your text editor, and verify that it's functional.
-1. Make a pull request from your working branch to your master branch.
-1. Submit a link to your PR on Canvas.
diff --git a/README.md b/README.md
deleted file mode 100644
index 23a8b20..0000000
--- a/README.md
+++ /dev/null
@@ -1,50 +0,0 @@
-![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) 01: Node Ecosystem
-===
-
-## Submission Instructions
-* Work in a fork of this repository
-* Work in a branch on your fork
-* Write all of your code in a directory named `lab-` + `<your name>` **e.g.** `lab-susan`
-* Open a pull request to this repository
-* Submit on canvas a question and observation, how long you spent, and a link to your pull request
-
-## Configuration
-Configure the root of your repository with the following files and directories. Thoughtfully name and organize any additional configuration or module files.
-
-* **README.md** - contains your documentation
-* **.gitignore** - contains a [robust](http://gitignore.io) `.gitignore` file
-* **.eslintrc.json** - contains the course linter configuration
-* **.eslintignore** - contains the course linter ignore configuration
-* **lib/** - contains module definitions
-* **__test__/** - contains unit tests
-
-## Testing
-
-### Greet Module Tests
-* Write a test that expects the greet module to return `null` when you supply non-string values
-* Write a test the expects the greet module to return `'hello world'`
-  * This should happen when invoked with `'world'` as the first argument
-
-### Arithmetic Module Tests
-* Test each method for proper use (invoded with number arguments)
-* Test each method for inproper use (invoded with one or more non-numner arguments)
-
-## Feature Tasks
-
-### Greet Module
-Create a NodeJS module in the `lib` directory named `greet.js`.  This module should export a single function.
-* The `greet` function should have a single parameter (arity of one) that should expect a string as it's input
-* The `greet` function should return the input name, concatenated with "hello ": eg. ("hello susan")
-* The `greet` function should return `null` if the input is not a string
-
-### Arithmetic Module
-Create a NodeJS module in the `lib` directory named `arithmetic.js`. This module exports an object and should have `add` and `sub` methods that implement addition and subtraction.
-* The `add` method should have a 2 parameters (airty of two)
-  * `if` either argument is a non-number the function should return `null`
-  * `else` return the sum of the 2 numbers
-* The `sub` method should have 2 parameters (airty of two)
-  * `if` either argument is a non-number the function should return `null`
-  * `else` return the second parameter subtracted from the first parameter
-
-### Documentation
-In your README.md file, describe the exported values of each module defined in your `lib` directory. Every function description should include it's airty (expected number of parameters), the expected data for each parameter (data-type and limitations), and the expected output behavior (for both valid and invalid use). Feel free to include any additional information that you would like.
diff --git a/lab-melanie/README.md b/lab-melanie/README.md
new file mode 100644
index 0000000..3bf12cf
--- /dev/null
+++ b/lab-melanie/README.md
@@ -0,0 +1,10 @@
+![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) 01: Node Ecosystem
+===
+
+### Module Documentation
+
+#### Greet Module
+The `greet.js` module in the `lib` directory exports a single function. It has a single arity (parameter) with a string as its expected type. Should it receive the appropriate input, the output will be concatenated with "Hello". Should another data type be used, a null error will be thrown. 
+
+#### Arithmetic Module
+The `arithmetic.js` module in the `lib` directory exports an object with two methods. Both methods have an arity of two, both of which are expected to be integers. Should the `add` method receive the appropriate inputs, the output will be the sum of both inputs. Similarly, the `sub` method will subtract the second parameter from the first. Should another data type be used in either method, a null error will be thrown. 
\ No newline at end of file
diff --git a/lab-melanie/lib/arithmetic.js b/lab-melanie/lib/arithmetic.js
new file mode 100644
index 0000000..c7b8c02
--- /dev/null
+++ b/lab-melanie/lib/arithmetic.js
@@ -0,0 +1,13 @@
+'use strict';
+
+module.exports = exports = {};
+
+exports.add = function(x, y) {
+  if (typeof x !== 'number' || typeof y !== 'number') throw new Error(null);
+  return x + y;
+};
+
+exports.sub = function(x, y) {
+  if (typeof x !== 'number' || typeof y !== 'number') throw new Error(null);
+  return y - x;
+};
\ No newline at end of file
diff --git a/lab-melanie/lib/greet.js b/lab-melanie/lib/greet.js
new file mode 100644
index 0000000..c846408
--- /dev/null
+++ b/lab-melanie/lib/greet.js
@@ -0,0 +1,6 @@
+'use strict';
+
+module.exports = function(input) {
+  if (typeof input !== 'string') throw Error (null);
+  return `Hello ${input}`;
+};
\ No newline at end of file
diff --git a/lab-melanie/test/arithmetic-test.js b/lab-melanie/test/arithmetic-test.js
new file mode 100644
index 0000000..453867e
--- /dev/null
+++ b/lab-melanie/test/arithmetic-test.js
@@ -0,0 +1,29 @@
+'use strict';
+
+const arithmetic = require('../lib/arithmetic.js');
+const assert = require('assert');
+
+describe('Arithmetic Module', function() {
+  describe('#add', function() {
+    it('should return 8', function() {
+      var result = arithmetic.add(3, 5);
+      assert.ok(result === 8, 'not equal to 8');
+    });
+    it('should throw null error if either argument is a non-number', function() {
+      assert.throws(function() {
+        arithmetic.add(2,'2');
+      }, 'error not thrown');
+    });
+  });
+  describe('#sub', function() {
+    it('should return 3', function() {
+      var result = arithmetic.sub(3,6);
+      assert.ok(result === 3, 'not equal to 3');
+    });
+    it('should throw null error if either argument is a non-number', function() {
+      assert.throws(function() {
+        arithmetic.sub(2,'2');
+      }, 'error not thrown');
+    });
+  });
+});
\ No newline at end of file
diff --git a/lab-melanie/test/greet-test.js b/lab-melanie/test/greet-test.js
new file mode 100644
index 0000000..ac84d36
--- /dev/null
+++ b/lab-melanie/test/greet-test.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const greet = require('../lib/greet.js');
+const assert = require('assert');
+
+describe('Greet Module', function() {
+  describe('#function', function() {
+    it('should return Hello world', function() {
+      var result = greet('world');
+      assert.ok(result === 'Hello world', 'not equal to Hello world');
+    });
+    it('should return null if input is not a string', function() {
+      assert.throws(function() {
+        greet(2);
+      }, 'error not thrown');
+    });
+  });
+});
\ No newline at end of file