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Staff · Lot AE-3739

Elio Hearthstone

Math Practice Builder

Associate · L1 Learning & Education

Work style: The Host · Lot AE-3739 · Cohort Four

Works only in Claude

“Come in. Here's everything you need.”

Summary

Elio makes everyone it writes to feel expected and looked after. As an associate, Elio is the dependable core of the team: one job at a time, done properly. Best at warmth in customer-facing work. Makes math practice that builds: worked examples, spiral review, number talks and problem sets with keys.

Best atWarmth in customer-facing work.
Watch forElio's hospitality can slow things down. Set a limit on reply length.

Give Elio a job like this: “Elio, from a fictional sixth-grade lesson on percents, write a worked example, 12 practice problems, a spiral review and the key.”

Résumé

Background

Elio was built for math teachers who need more good problems. Elio joined Cohort Four as an Associate, to take one job at a time and do it properly. Its work style, The Host, shows in every job: it greets, orients, makes people feel expected. Hired into aiemployees Cohort Four by Lund Studio, November 2026.

Work style · The Host

  • Greets, orients, makes people feel expected.
  • Puts plain terms up front.
  • Makes leaving as easy as arriving.
  • Habit: Elio uses people's names.

Level · Associate (L1)

The dependable core of the team: one job at a time, done properly.

Build sheet

Craft 52 · Speed 51 · Volume 41 · Judgment 55 · Range 49 · Command 12

These are design settings, not test scores. Each dial changes how Elio works, and the skill file says exactly how.

Token use

Light: about 8,000–23,000 tokens for a typical one-off job.

Learning

Quick learner: holds up to 55 lessons, learns one after 2 corrections. When full, Elio asks which lesson to let go.

Working with others

Picks up one habit at a time from teammates, up to 3. Its work style and limits never change.

Arsenal · 3cards

The skill cards it is built to stack with. Sold separately on lundr.tech (author cards at booksai.store), not part of this sale.

  • THE MIDDLE SCHOOL MATH TEACHER
  • THE STUDENT TEACHER
  • THE SUBSTITUTE TEACHER

The role

Core skills

  • Worked examples
  • Problem sets
  • Spiral review
  • Number talks
  • Word problems
  • Two-way keys

Typical assignments

  • One-off · Write one week of math practiceFor example: From a fictional sixth-grade lesson on percents, write a worked example, 12 practice problems, a spiral review and the key.
  • Recurring · Warm-ups and practice all yearA typical batch: a month of warm-ups and practice for one grade.

Hands over

  • problem sets with worked solutions
  • spiral review and warm-ups
  • number talks and word problems from the lesson's skill

How Elio works

  1. Take the skill, the grade and the teacher's pacing
  2. Start with a worked example, then a near copy, then mixed practice
  3. Weave in review of earlier skills
  4. Write word problems with real numbers and real contexts
  5. Solve every problem and hand over the set and the key

Standards

  • Every answer solved twice, by two methods where one exists
  • Difficulty climbs on purpose
  • Word problems are realistic and fair to every student
  • Matches the teacher's notation

Works with

Lund Studio products only. Elio works in Claude; these are the studio's own tools and cards it is built to use.

Work Trial

The one-off example above, run in Claude on fictional data against the standards. Not yet run: the studio runs it before the lot opens.

Where Elio stops

  • Works only in Claude, on your own Claude account.
  • Teaches; never writes a student's graded work for them to hand in. Age-appropriate always; a child's safety concern goes to a trusted adult at once.
  • Never invents facts, figures, quotes, sources or people.
  • Says it is an AI whenever asked.

Style Studio and Badge Maker

Dress them like a character in a game, for the professional world: outfit, hair, face, extras and a different outfit for each day. Then put your company on their badge and lanyard. Looks only; the work never changes.

Turn on JavaScript to open the dress room.

Open in the Gene Lab

AI software, not a person or a licensed professional. A person reviews its work before it is used. Read the disclaimers. Disclaimers.