The Cheating Device (ChatGPT on a TI-84) [video]

Original Article ↗ Hacker News Discussion ↗

Impact of AI on Exams and Homework

  • Many wonder what traditional exams mean when students can easily use AI (and previously, the open internet) to generate essays, solve problems, and cheat remotely or via smartphones.
  • Several propose shifting assessment toward supervised testing centers, in-class quizzes, and oral/1:1 examinations to verify genuine understanding, though concerns about scalability, consistency, and bias are raised.
  • Some argue homework should become ungraded practice, with all graded work done under supervision; others say homework remains valuable for practice and grade “cushioning.”
  • There is disagreement over embracing AI (treating it as a standard tool and raising the abstraction level of curricula) vs. restricting it to preserve learning of fundamentals.

Cheating, Degrees, and Educational Value

  • Some claim cheating is now rampant, especially with LLMs, and that many professors underestimate its scale.
  • One stance: college is mostly about obtaining a credential; students should “optimize” for the easiest path, even via cheating.
  • Counterpoint: this mindset devalues degrees, especially from non-elite schools, and harms honest students; strong defense of academic integrity and of learning for long‑term competence.
  • Discussion notes that brand‑name universities retain signaling power partly because it’s harder to cheat all the way through them.

Programmable Calculators as Learning Tools (and Cheating Tools)

  • Many recount learning programming on TI and HP calculators, writing solvers for algebra, calculus, and physics, games, and even fractal renderers.
  • Several teachers tolerated or encouraged such programs if students wrote them themselves, seeing them as evidence of deep understanding.
  • Others were hostile, treating any programming as cheating, which some commenters feel discouraged future interest in CS.
  • Distinction is drawn between programming your own tools (learning-enhancing “hacking”) versus merely copying others’ programs (pure cheating).

The TI-84 + ESP32 “Cheating Device” Project

  • The featured project embeds an ESP32 inside a TI‑84, wired to the link port and level-shifted via a small custom PCB, allowing the calculator to talk to online services like ChatGPT.
  • Commenters generally praise the hack’s ingenuity but some criticize the “YouTube-style” presentation (fast cuts, memes, low technical depth), preferring more detailed, slower explanations.

Calculator Ecosystem and Policy

  • TI‑84s remain common due to exam rules, despite dated hardware and high prices; alternatives like Numworks and TI‑Nspire are mentioned.
  • Schools use various anti‑cheating tactics: memory wipes, swapping in school-owned calculators, banning programmables, and speculating about future Faraday-cage classrooms.