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-\section{Modular Programming}\label{modular-programming}
-
-\subsection{1. Introduction}\label{introduction}
-
-\begin{itemize}
-\tightlist
-\item
-  A. What is Object-Oriented Programming?
-\item
-  B. Why use OOP? (vs.~procedural)
-\item
-  C. Real-world analogies (e.g., modeling components like pumps, motors,
-  or vehicles)
-\end{itemize}
-
-\subsection{2. Core OOP Concepts}\label{core-oop-concepts}
-
-\begin{itemize}
-\tightlist
-\item
-  A. \textbf{Classes and Objects}
-
-  \begin{itemize}
-  \tightlist
-  \item
-    Definitions
-  \item
-    Syntax in Python
-  \end{itemize}
-\item
-  B. \textbf{Attributes and Methods}
-
-  \begin{itemize}
-  \tightlist
-  \item
-    Instance variables
-  \item
-    Functions inside classes
-  \end{itemize}
-\item
-  C. \textbf{Encapsulation}
-
-  \begin{itemize}
-  \tightlist
-  \item
-    Public vs private variables
-  \item
-    Using \texttt{\_\_init\_\_} and \texttt{self}
-  \end{itemize}
-\item
-  D. \textbf{Inheritance}
-
-  \begin{itemize}
-  \tightlist
-  \item
-    Parent and child classes
-  \item
-    Reuse and extension of code
-  \end{itemize}
-\item
-  E. \textbf{Polymorphism} \emph{(brief overview)}
-
-  \begin{itemize}
-  \tightlist
-  \item
-    Method overriding
-  \item
-    Flexibility in interfaces
-  \end{itemize}
-\end{itemize}
-
-\subsection{3. Python OOP Syntax and
-Examples}\label{python-oop-syntax-and-examples}
-
-\begin{itemize}
-\tightlist
-\item
-  A. Define a simple class (e.g., \texttt{Spring})
-\item
-  B. Instantiate objects and use methods
-\item
-  C. Show \texttt{\_\_init\_\_}, \texttt{\_\_str\_\_}, custom methods
-\item
-  D. Add a derived class (e.g., \texttt{DampedSpring} inherits from
-  \texttt{Spring})
-\end{itemize}
-
-\subsection{4. Engineering Applications of
-OOP}\label{engineering-applications-of-oop}
-
-\begin{itemize}
-\tightlist
-\item
-  A. Modeling a mechanical system using classes
-
-  \begin{itemize}
-  \tightlist
-  \item
-    Example: Mass-Spring-Damper system
-  \end{itemize}
-\item
-  B. Creating reusable components (e.g., \texttt{Material},
-  \texttt{Beam}, \texttt{Force})
-\item
-  C. Organizing simulation code with OOP
-\end{itemize}
-
-\subsection{5. Hands-On Coding Activity}\label{hands-on-coding-activity}
-
-\begin{itemize}
-\tightlist
-\item
-  A. Write a class for a basic physical component (e.g., \texttt{Motor})
-\item
-  B. Add behavior (e.g., \texttt{calculate\_torque})
-\item
-  C. Extend with inheritance (e.g., \texttt{ServoMotor})
-\item
-  D. Bonus: Integrate two objects to simulate interaction
-\end{itemize}