diff --git a/.classpath b/.classpath
new file mode 100644
index 0000000..3e0fb27
--- /dev/null
+++ b/.classpath
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/src/debug/ContainerArray.java b/src/debug/ContainerArray.java
index 124ece6..455ea8f 100755
--- a/src/debug/ContainerArray.java
+++ b/src/debug/ContainerArray.java
@@ -2,7 +2,7 @@
 
 
 public class ContainerArray<E> {
-    private int initialCapacity = 10;
+    private int limit = 10;
     private int currentSize = 0;
     private Object[] internalArray;
 
@@ -10,11 +10,15 @@ public ContainerArray () {
         this(10);
     }
 
-    public ContainerArray (int initialCapacity) {
-        internalArray = new Object[initialCapacity];
+    public ContainerArray (int limit) {
+        internalArray = new Object[limit];
     }
 
     public void add (E element) {
+    	if(currentSize == limit) {
+    		limit *= 2;
+    		internalArray = new Object[limit];
+    	}
         internalArray[currentSize++] = element;
     }
 
@@ -23,8 +27,18 @@ public int size () {
     }
 
     public void remove (E objectToRemove) {
+    	for(int i=0;i<internalArray.length;i++){
+    		if(internalArray[i]==objectToRemove){
+    			removeIndex(i);
+    		}
+    	}
         currentSize--;
     }
+    public void removeIndex(int i){
+    	for(int j=i;j<internalArray.length-1;j++){
+    		internalArray[j]=internalArray[j+1];
+    	}
+    }
 
     @SuppressWarnings("unchecked")
     public E get (int index) {
diff --git a/src/debug/ContainerArrayTest.java b/src/debug/ContainerArrayTest.java
index c566d50..4af14dc 100755
--- a/src/debug/ContainerArrayTest.java
+++ b/src/debug/ContainerArrayTest.java
@@ -10,7 +10,14 @@ public class ContainerArrayTest {
 
     @Before
     public void setUp () {
-        myContainer = new ContainerArray<>();
+        myContainer = new ContainerArray<String>();
+    }
+    
+    @Test
+    public void testSizeLimit() {
+    	for(int i = 0; i < 11; i++) {
+    		myContainer.add(i + "TapDancers");
+    	}
     }
 
     @Test
@@ -44,4 +51,13 @@ public void testObjectIsRemoved () {
         myContainer.remove("Bear");
         assertEquals("Remove should be same reference", alligator, myContainer.get(0));
     }
+    @Test
+    public void testObjectProperlyRemoved(){
+    	String alligator = "Alligator";
+        myContainer.add("Alligator");
+        myContainer.add("Bear");
+        myContainer.add("Deer");
+        myContainer.remove("Alligator");
+        assertEquals("Remove should be same reference","Bear", myContainer.get(0));
+    }
 }
diff --git a/src/tdd/Sheet.java b/src/tdd/Sheet.java
new file mode 100644
index 0000000..00319d2
--- /dev/null
+++ b/src/tdd/Sheet.java
@@ -0,0 +1,33 @@
+package tdd;
+
+import java.util.HashMap;
+
+public class Sheet {
+	private HashMap<String, String> myMap;
+	public Sheet() {
+		// TODO Auto-generated constructor stub
+		myMap=new HashMap<String, String>();
+	}
+	public String get(String string) {
+		if(myMap.get(string)==null){
+			return "";
+		}
+		try{
+			String copy = "" + myMap.get(string);
+			copy = copy.trim();
+			Integer.parseInt(copy);	
+			return copy;
+		} catch (Exception e) {
+			return myMap.get(string);
+		}
+	}
+	
+	public void put(String key, String value){
+		myMap.put(key, value);
+	}
+	
+	public String getLiteral(String key) {
+		return myMap.get(key);
+	}
+
+}
diff --git a/src/tdd/TestSheet.java b/src/tdd/TestSheet.java
new file mode 100644
index 0000000..7461f96
--- /dev/null
+++ b/src/tdd/TestSheet.java
@@ -0,0 +1,85 @@
+package tdd;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class TestSheet {
+
+	@Test
+	public void test() {
+		testThatCellsAreEmptyByDefault();
+		testThatTextCellsAreStored();
+		testThatManyCellsExist();
+		testThatNumericCellsAreIdentifiedAndStored();
+		testThatWeHaveAccessToCellLiteralValuesForEditing();
+	}
+	
+	public void testThatCellsAreEmptyByDefault() {
+		  Sheet sheet = new Sheet();
+		  assertEquals("", sheet.get("A1"));
+		  assertEquals("", sheet.get("ZX347"));
+		}
+	public void testThatTextCellsAreStored() {
+		  Sheet sheet = new Sheet();
+		  String theCell = "A21";
+
+		  sheet.put(theCell, "A string");
+		  assertEquals("A string", sheet.get(theCell));
+
+		  sheet.put(theCell, "A different string");
+		  assertEquals("A different string", sheet.get(theCell));
+
+		  sheet.put(theCell, "");
+		  assertEquals("", sheet.get(theCell));
+		}
+	public void testThatManyCellsExist() {
+		  Sheet sheet = new Sheet();
+		  sheet.put("A1", "First");
+		  sheet.put("X27", "Second");
+		  sheet.put("ZX901", "Third");
+
+		  assertEquals("A1", "First", sheet.get("A1"));
+		  assertEquals("X27", "Second", sheet.get("X27"));
+		  assertEquals("ZX901", "Third", sheet.get("ZX901"));
+
+		  sheet.put("A1", "Fourth");
+		  assertEquals("A1 after", "Fourth", sheet.get("A1"));
+		  assertEquals("X27 same", "Second", sheet.get("X27"));
+		  assertEquals("ZX901 same", "Third", sheet.get("ZX901"));
+		}
+	public void testThatNumericCellsAreIdentifiedAndStored() {
+		  Sheet sheet = new Sheet();
+		  String theCell = "A21";
+
+		  sheet.put(theCell, "X99"); // "Obvious" string
+		  assertEquals("X99", sheet.get(theCell));
+
+		  sheet.put(theCell, "14"); // "Obvious" number
+		  assertEquals("14", sheet.get(theCell));
+
+		  sheet.put(theCell, " 99 X"); // Whole string must be numeric
+		  assertEquals(" 99 X", sheet.get(theCell));
+
+		  sheet.put(theCell, " 1234 "); // Blanks ignored
+		  assertEquals("1234", sheet.get(theCell));
+
+		  sheet.put(theCell, " "); // Just a blank
+		  assertEquals(" ", sheet.get(theCell));
+		}
+	
+	public void testThatWeHaveAccessToCellLiteralValuesForEditing() { 
+		  Sheet sheet = new Sheet();
+		  String theCell = "A21";
+
+		  sheet.put(theCell, "Some string"); 
+		  assertEquals("Some string", sheet.getLiteral(theCell));
+
+		  sheet.put(theCell, " 1234 "); 
+		  assertEquals(" 1234 ", sheet.getLiteral(theCell));
+
+		  sheet.put(theCell, "=7"); // Foreshadowing formulas:)
+		  assertEquals("=7", sheet.getLiteral(theCell));
+		}
+
+}