diff --git a/.gitignore b/.gitignore
index bee8a64..8691330 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 __pycache__
+*.json
diff --git a/expression.py b/expression.py
new file mode 100644
index 0000000..1c7a3f6
--- /dev/null
+++ b/expression.py
@@ -0,0 +1,27 @@
+class Expression:
+	expression = ""
+	variables = []
+	
+	def __init__(self, expression_string, variables):
+		self.expression = expression_string
+		self.variables = variables
+		
+class Variable:
+	VARIABLE_TYPES = {
+		"i" : "Interest",
+		"I" : "Interest",
+		"n" : "Time",
+		"N" : "Time"
+	}
+	
+	def __init__(self, name, type, starting_point = 0, ending_point = 0):
+		self.name = name
+		self.type = type
+		self.starting_point = starting_point
+		self.ending_point = ending_point
+		
+	@staticmethod
+	def get_variable_type(variable_name):
+		if not variable_name in Variable.VARIABLE_TYPES:
+			return "Unknown"
+		return Variable.VARIABLE_TYPES[variable_name]
diff --git a/json_generator/data.json b/json_generator/data.json
deleted file mode 100644
index 1166f00..0000000
--- a/json_generator/data.json
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-    "expression": "i + 2 + n",
-    "variables": {
-        "n1": {
-            "name": "n1",
-            "type": "Unknown",
-            "starting_point": 0,
-            "ending_point": 0
-        },
-        "i1": {
-            "name": "i1",
-            "type": "Unknown",
-            "starting_point": 0,
-            "ending_point": 0
-        }
-    }
-}
\ No newline at end of file
diff --git a/json_generator/expression.py b/json_generator/expression.py
index 1c7a3f6..a79ce9f 100644
--- a/json_generator/expression.py
+++ b/json_generator/expression.py
@@ -1,10 +1,12 @@
 class Expression:
 	expression = ""
+	correct_answer = 0
 	variables = []
 	
-	def __init__(self, expression_string, variables):
+	def __init__(self, expression_string, variables, correct):
 		self.expression = expression_string
 		self.variables = variables
+		self.correct_answer = correct
 		
 class Variable:
 	VARIABLE_TYPES = {
diff --git a/json_generator/main.py b/json_generator/main.py
index 4419eb0..d8b60ec 100644
--- a/json_generator/main.py
+++ b/json_generator/main.py
@@ -66,6 +66,11 @@ def transform(object):
         raise TypeError("Only Books and Index will be JSON serialized!")
 
 exp = input("Enter the expression the student will use: ")
+correct_answer = input("Enter the correct anwser for the expression: ")
+try:
+	correct_answer = float(correct_answer)
+except ValueError:
+	print("The anwser must be numeric! Will not be included in output file.")
 tokens = tokenizer.get_tokens_from_expression_string(exp)
 
 for t in tokens:
@@ -92,5 +97,5 @@ while True:
 		print("Invalid selection %s." %(response))
 		continue
 		
-with open("data.json", "w", encoding="utf-8") as f:
-	json.dump(expression.Expression(exp, variables), f, default=transform, indent = 4)
+with open("expression.json", "w", encoding="utf-8") as f:
+	json.dump(expression.Expression(exp, variables, correct_answer), f, default=transform, indent = 4)
diff --git a/main.py b/main.py
index f1b4482..c45cbde 100755
--- a/main.py
+++ b/main.py
@@ -1,5 +1,6 @@
 import token
 import tokenizer
+import expression
 import calc_engine
 import json
 
@@ -9,6 +10,10 @@ fileLocation = input('File Path to JSON: ')
 
 #userInput = input('Enter your formula: ')
 tokens = tokenizer.get_tokens_from_expression_string("2 + 6 / 2")
+with open("expression.json", "r") as f:
+	j = json.load(f)
+	exp = expression.Expression(json.loads(j))
+	print(exp)
 #results = calc_engine.calculate_results(tokens.copy())
 #print(results)