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diff --git a/tutorials/module_1/basics_of_python.md b/tutorials/module_1/basics_of_python.md
index 776af44..80b05d3 100644
--- a/tutorials/module_1/basics_of_python.md
+++ b/tutorials/module_1/basics_of_python.md
@@ -91,7 +91,7 @@ The comprehensive table below show all built-in data types available in python.
 
 ## Variables
 
-A **variable** in Python is a name that stores a value, allowing you to use and manipulate data efficiently.
+A **variable** in Python is a name that stores a value, allowing you to use and manipulate data efficiently. In mathematics it is common to use a single letter to represent a variable, in programming descriptive variables are used to make it easier for whoever is reading the code to understand what is going on. You may remember what `x` is when writing the code, but when you revise it in the future, it may not be easy to remember what `x` represented in your 200 lines of code. In engineering it is encourage to use descriptive (such as `velocity_data`) or common convention symbols (`omega` for angular velocity). For this section arbitrary variables are used for the purpose of showing how variables works.
 
 #### Declaring and Assigning Variables