Post-Primitive-tier:
-Number,
-One Hundred,
-One Thousand,
-One Trillion,
-World
-Universe
-Light
-Line,
-Triangle,
-Square,
-Polygon
-Addition
-Subtraction
-Multiplication
-Division

Okay-tier:
-Philosophy,
-Mathematics,
-Physics,
-Chemistry,
-Biology,
-Atoms,
-Gravitation,
-Electricity
-Wave
-Country
-State
-City
-Capital

Good-tier:
-Photosynthesis
-Equation
-Element
-Hydrogen
-Mechanics
-Acceleration
-Prism
-Spectrum

Excellent-tier:
-Electromagnetism
-Radiation
-Quantum Mechanics
-Quantum Superposition
-Photoelectric Effect
-Radio
-Telephone
-Television

God-tier:
-Computer
-Internet
-Binary Space Partition
-Polymorphism
-Operator Overloading
-Quantum Entanglement