Start with bits, then trace how binary, bytes, hex, addition, negatives, and gates make computers work
3 sections · 7 lessons
Define why digital hardware uses bits, then count in binary and interpret nibbles and bytes as fixed-size bundles of information.
3 lessonsConvert between binary and hexadecimal, add binary numbers with carries, and check results against decimal values.
2 lessonsRepresent negative integers with two’s complement and examine how logic gates and truth tables drive bit-level operations.
2 lessonsComputers rely on bits because digital hardware can store and move information with two stable states. This course builds a clear picture of how those bits turn into numbers, packed data, arithmetic, negative values, and basic decision-making inside a machine. It is aimed at complete beginners who want the underlying ideas without skipped steps or code. By the end, you can read and reason about the building blocks that sit underneath computer data and logic.
The course covers why computers use two-state information, counting in binary, and the meaning of nibbles, bytes, and bit-width. It also covers hexadecimal as a compact binary notation, binary addition with carries, two’s complement for negative numbers, and truth tables for NOT, AND, OR, and XOR.
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Something to operate in every section.
Three findings from decades of learning research shaped how every Fenzo lesson is built.
Average pass rate · Freeman et al., PNAS 2014
What the science says
Students in lecture-only classes are 1.5× more likely to fail.
How Fenzo does it
Every Fenzo lesson is interactive. No passive reading or watching, ever.
You work through itAI does it for you
Skill retention over time · with vs. without practice
What the science says
Offloading thinking to AI erodes the very skills you’re trying to build.
How Fenzo does it
Fenzo makes you do the thinking — guided, but never done for you.
Retrieval practiceRe-reading
Long-term recall · retrieval vs. re-reading
What the science says
Recalling information beats re-reading it for building durable understanding.
How Fenzo does it
Lessons weave in quizzes and recall prompts, so it sticks.