What is the definition of Classes Fluid?

"'Classes fluid' means that education is no longer a rigid, iron-clad cage where you're stuck in the same class your whole life. Instead, it's like a cosmic dance-off where you can hop from one high school to another, or even an online class to a traditional classroom, as long as you're ready to learn new moves and break out of your old self-imposed constraints."

---

Now, here's a sentence that might send shivers down the spines of some: "The 'classes fluid' theory suggests that my college courses are more like a roller coaster of confusion and self-discovery, where I'm constantly switching tracks from 'Introduction to Philosophy' to 'Advanced Astrophysics,' leaving me questioning if I've become a cosmic astronaut or just a lost space traveler."