top of page
Our Classes
Welcome everyone to the largest source of independent original ESL class material in the world.
Here you'll find all kinds of ready-to-use classes for your advanced ESL journey! Become a MASERA Student or join our subscription program for ESL Teachers today!
Search


The Social Credit Idea: A Modern System of Trust
The social credit idea is a concept that seeks to evaluate and regulate citizens’ behavior based on their actions and reputation. Originally popularized by China’s Social Credit System , this model uses data from financial records, social behavior, and even online activity to determine how “trustworthy” an individual or organization is. The concept is controversial because, while it promotes accountability, it also raises concerns about privacy and control. How It Works A so
Marcelo Serafim
6 hours ago4 min read


3I/ATLAS
The object designated 3I/ATLAS was discovered on 1 July 2025 by the Asteroid Terrestrial‑impact Last Alert System (ATLAS) telescope in Río Hurtado, Chile. Because of its trajectory and speed, the object is classified as an interstellar object: it is not bound by the Sun’s gravity in a normal elliptical orbit, but rather follows a hyperbolic path, indicating it arrived from outside our Solar System. This makes it only the third confirmed interstellar object after 1I/ʻOumuamu
Marcelo Serafim
3 days ago6 min read


The Rise of OnlyFans
1. Introduction
Marcelo Serafim
3 days ago4 min read


Understanding China: Government, Society, and Economy
1. Introduction
Marcelo Serafim
Oct 214 min read


TikTok: The Global Social Media Phenomenon
Introduction TikTok is a social media platform that allows users to create, share, and discover short videos, often accompanied by music, filters, and creative effects. Since its global launch in 2018, it has become a cultural phenomenon, attracting millions of users daily. Its rapid rise in popularity can be attributed to its algorithm, which makes content highly personalized and addictive. Ownership and Origins TikTok is owned by ByteDance, a Chinese technology company foun
Marcelo Serafim
Oct 204 min read


A Customer-Centric Approach: Putting the Customer First
A customer-centric approach is a business strategy that focuses on putting the customer at the heart of every decision. Rather than building products and then looking for buyers, companies that adopt this approach start by understanding customer needs , preferences, and expectations. The goal is to build long-term relationships, increase satisfaction, and foster loyalty. Today, this philosophy has become one of the key differentiators between successful and struggling busine
Marcelo Serafim
Oct 154 min read


Top 10 Must-Read Classic Books
Pride and Prejudice by Jane Austen Published in 1813, this novel remains one of the most beloved romances in English literature. It follows the intelligent and independent Elizabeth Bennet as she navigates societal expectations and personal growth. Her relationship with Mr. Darcy evolves from misunderstanding and pride to mutual respect and love. Beneath the love story, Austen explores issues of class, marriage, and gender roles in Georgian England with wit and social commen
Marcelo Serafim
Oct 145 min read


Immigration - Muslim Europe: Challenges and Debates
A Historical Overview
Marcelo Serafim
Oct 94 min read


Drugs and the Rise of the Fentanyl Epidemic
1. Ancient Roots of Medicine and Drugs The use of drugs dates back thousands of years, long before modern science existed. Ancient...
Marcelo Serafim
Oct 64 min read
bottom of page