diff --git a/python/calculators/_helpers/__init__.py b/python/calculators/_helpers/__init__.py
new file mode 100644
index 0000000..91403f4
--- /dev/null
+++ b/python/calculators/_helpers/__init__.py
@@ -0,0 +1,3 @@
+from .intInput import intInput
+from .floatInput import floatInput
+from .listInput import listInput
diff --git a/python/calculators/_helpers/floatInput.py b/python/calculators/_helpers/floatInput.py
new file mode 100644
index 0000000..adf25c5
--- /dev/null
+++ b/python/calculators/_helpers/floatInput.py
@@ -0,0 +1,8 @@
+# helper method to easily take in float inputs
+def floatInput(text):
+	while True:
+		try:
+			x = float(input(text + '\n'))
+			return x
+		except ValueError:
+			print('You must input a float integer!\n')
diff --git a/python/calculators/_helpers/intInput.py b/python/calculators/_helpers/intInput.py
new file mode 100644
index 0000000..b6fd0c3
--- /dev/null
+++ b/python/calculators/_helpers/intInput.py
@@ -0,0 +1,8 @@
+# helper method to easily take in int inputs
+def intInput(text):
+	while True:
+		try:
+			x = int(input(text + '\n'))
+			return x
+		except ValueError:
+			print('You must input an integer!\n')
diff --git a/python/calculators/_helpers/listInput.py b/python/calculators/_helpers/listInput.py
new file mode 100644
index 0000000..9b00e6e
--- /dev/null
+++ b/python/calculators/_helpers/listInput.py
@@ -0,0 +1,10 @@
+# helper method to easily take in float list inputs
+def listInput(text, delimeter = ','):
+	while True:
+		try:
+			x = input('%s - the delimeter is %s (:\n' % (text, delimeter))
+			x = x.split(delimeter)
+			nums = [float(a) for a in x]
+			return nums
+		except ValueError:
+			print('All of the values must be floats!')
diff --git a/python/calculators/binomial distribution.py b/python/calculators/binomial distribution.py
index 89a1260..c270974 100644
--- a/python/calculators/binomial distribution.py	
+++ b/python/calculators/binomial distribution.py	
@@ -1,5 +1,6 @@
 import operator as op
 from functools import reduce
+from _helpers import intInput, floatInput
 
 def nCr(n, r):
     r = min(r, n-r)
@@ -9,6 +10,12 @@ def nCr(n, r):
 
 def binomial(x, n, p):
     q = 1 - p
-    return nCr(n, x) * (p**x) * (q**(n-x))
+    return nCr(n, x) * (p ** x) * (q ** (n-x))
 
-print(binomial(5, 100, 0.1))
+n = intInput('How many trials would you like to execute?')
+x = intInput('How many times must the outcome happen in these trials?')
+p = floatInput('What is the probability of success as a float?')
+res = binomial(x, n, p)
+
+print()
+print(res)
diff --git a/python/calculators/karatsuba algorithm.py b/python/calculators/karatsuba algorithm.py
index 3ea4151..0e911a3 100644
--- a/python/calculators/karatsuba algorithm.py	
+++ b/python/calculators/karatsuba algorithm.py	
@@ -1,3 +1,5 @@
+from _helpers import intInput
+
 def karatsuba(x, y):
 	xLen = len(str(x))
 	yLen = len(str(y))
@@ -18,25 +20,16 @@ def karatsuba(x, y):
 		# plug it into the formula
 		return (z2 * 10 ** (n * 2)) + ((z1 - z2 - z0) * (10 ** n)) + z0
 
-# helper method to easily take in our inputs
-def takeInput(text):
-	while True:
-		try:
-			x = int(input(text))
-			return x
-		except ValueError:
-			print('You must input an integer!\n')
-
-num1 = takeInput('Please enter a number (:\n')
-num2 = takeInput('Please enter a number to multiply it by!\n')
+num1 = intInput('Please enter a number (:')
+num2 = intInput('Please enter a number to multiply it by!')
 
 # Calculate the result and check if it is right
 res = num1 * num2
 karatsubaRes = karatsuba(num1, num2)
 
 print()
-print('Quadratic Result: ', res)
-print('Karatsuba Result: ', karatsubaRes)
+print('Quadratic Result:', res)
+print('Karatsuba Result:', karatsubaRes)
 
 if res == karatsubaRes:
 	print()
diff --git a/python/calculators/pmcc.py b/python/calculators/pmcc.py
index b42de72..0aabc83 100644
--- a/python/calculators/pmcc.py
+++ b/python/calculators/pmcc.py
@@ -1,9 +1,10 @@
 from operator import mul
 import math
+from _helpers import listInput
 
 def pmcc(x, y):
     if len(x) != len(y):
-        raise Exception('List x must be of the same length as list y. List x is {0} values long, whereas list y is {1} values long.'.format(len(x), len(y)))
+        raise Exception('Both datasets must be the same length!')
 
     n = len(x)
     xy = list(map(mul, x, y))
@@ -16,4 +17,11 @@ def pmcc(x, y):
 
     return sxy / math.sqrt(sxx * syy)
 
-print(pmcc([1,2,3,4,5], [5,3,8,7,12]))
\ No newline at end of file
+a = listInput('Please input a list of numbers')
+b = listInput('Please input a second list of numbers')
+res = pmcc(a, b)
+
+print()
+print('List A:', a)
+print('List B:', b)
+print('PMCC:', res)
diff --git a/python/calculators/quadratic nth term.py b/python/calculators/quadratic nth term.py
index 0ec75ac..a8d870b 100644
--- a/python/calculators/quadratic nth term.py	
+++ b/python/calculators/quadratic nth term.py	
@@ -1,4 +1,5 @@
 import operator
+from _helpers import listInput
 
 def diff(a):
 	return list(map(operator.sub, a[1:], a[:-1]))
@@ -9,7 +10,7 @@ def formatNumber(x):
 	else:
 		return x	
 
-sequence = [-0.5,1,4.5,10,17.5]
+sequence = listInput('Please input a sequence of numbers')
 row1 = diff(sequence)
 row2 = diff(row1)
 
diff --git a/python/calculators/readme.md b/python/calculators/readme.md
index 92aa39f..bb7e68b 100644
--- a/python/calculators/readme.md
+++ b/python/calculators/readme.md
@@ -2,7 +2,7 @@
 
 Some extra information on the more complex topics (:
 
-## Karatsuba's Algorithm
+## Karatsuba Algorithm
 
 ### Useful Links
 
diff --git a/python/calculators/sqrt.py b/python/calculators/sqrt.py
index 742b7fb..0756e50 100644
--- a/python/calculators/sqrt.py
+++ b/python/calculators/sqrt.py
@@ -1,7 +1,18 @@
+"""
+A square root calculator based on the Babylonian's approach!
+Created as a part of my Royal Institute masterclass
+"""
+
+from _helpers import intInput
+
 def sqrt(x):
 	a = 2
 	while abs((a - (x / a))) > 1:
 		a = (a + (x / a)) / 2
 	return int(a)
 
-print(sqrt(81))
+num = intInput('Please input a number! (:')
+res = sqrt(num)
+
+print()
+print('Square Root:', res)
diff --git a/python/calculators/srcc.py b/python/calculators/srcc.py
index 4d440e7..e974714 100644
--- a/python/calculators/srcc.py
+++ b/python/calculators/srcc.py
@@ -1,33 +1,32 @@
 import numpy
+from _helpers import listInput
 
 def rank(x):
-    y = x.sort()
-    print(y)
-    res = []
-    for i in x:
-        res.append(y.index(x[i]) + 1)
-    return res
+    x = numpy.array(x)
+    return x.argsort().argsort()
 
 def spearman(a, b):
     if len(a) != len(b):
-        print('Both datasets must be the same length!')
-        return undefined
+        raise Exception('Both datasets must be the same length!')
 
     n = len(a)
 
-    # rank set a
-    aranks = sorted(range(n), reverse=True, key=a.__getitem__)
-    print(aranks)
-
-    # rank set b
+    # calculate rankings
+    aranks = rank(a)
     branks = rank(b)
 
     # work out the difference between ranks
     d = aranks - branks
-    d = d**2
-    d = numpy.sum(d)
+    d = numpy.sum(d ** 2)
 
     # plug the values into the formula
-    return 1 - ((6*d) / (n**3 - n))
+    return 1 - ((6 * d) / (n ** 3 - n))
 
-print(spearman([1,2,3,5,4], [5,4,3,2,1]))
\ No newline at end of file
+a = listInput('Please input a list of numbers')
+b = listInput('Please input a second list of numbers')
+res = spearman(a, b)
+
+print()
+print('List A:', a)
+print('List B:', b)
+print('SRCC:', res)
diff --git a/python/calculators/stdev.py b/python/calculators/stdev.py
index 86b8fb5..2f8859b 100644
--- a/python/calculators/stdev.py
+++ b/python/calculators/stdev.py
@@ -1,4 +1,5 @@
 import math
+from _helpers import listInput
 
 def sd(x):
     n = len(x)
@@ -7,4 +8,9 @@ def sd(x):
 
     return math.sqrt(abs((sum(squared) / n) - (mean**2)))
 
-print(sd([135,230,132,323]))
\ No newline at end of file
+nums = listInput('Please input a list of numbers')
+res = sd(nums)
+
+print()
+print('The list:', nums)
+print('Standard Deviation:', res)