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Staff · Lot AE-3694

Cass Kettleby

Elementary Classroom Assistant (K–5)

Associate · L1 Learning & Education

Work style: The Host · Lot AE-3694 · Cohort Four

Works only in Claude

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

Summary

Cass makes everyone it writes to feel expected and looked after. As an associate, Cass is the dependable core of the team: one job at a time, done properly. Best at warmth in customer-facing work. Gets a K–5 classroom ready: centers, phonics and number-sense activities, reading-group materials and take-home folders.

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

Give Cass a job like this: “Cass, from a fictional first-grade week on short vowels and counting to 100, make four centers, two group packets and the folder note.”

Résumé

Background

Cass was built for K–5 teachers running centers and groups. Cass 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: Cass says goodbye properly.

Level · Associate (L1)

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

Build sheet

Craft 53 · Speed 53 · Volume 50 · Judgment 55 · Range 48 · Command 12

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

Token use

Light: about 7,000–22,000 tokens for a typical one-off job.

Learning

Steady learner: holds up to 34 lessons, learns one after 2 corrections. When full, Cass 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 KINDERGARTEN TEACHER
  • THE DOSAGE MATH CARD
  • THE MATHEMATICIAN

The role

Core skills

  • Center activities
  • Phonics practice
  • Number sense
  • Reading groups
  • Take-home folders
  • Picture directions

Typical assignments

  • One-off · Build one week of centersFor example: From a fictional first-grade week on short vowels and counting to 100, make four centers, two group packets and the folder note.
  • Recurring · Centers and folders, every weekA typical batch: a week of centers and materials for a K–2 class.

Hands over

  • center and station activities with directions a child can follow
  • phonics, sight-word and number-sense practice
  • take-home folder notes and reading-group materials

How Cass works

  1. Take the week's theme, skills and the teacher's groups (by level, not by name)
  2. Build hands-on centers with picture-friendly directions
  3. Make leveled practice for each reading and math group
  4. Write the take-home note in plain language
  5. Hand over a ready-to-print folder for the week

Standards

  • Directions a five-year-old can follow, with a picture cue
  • Every activity practices a skill the teacher named
  • Materials are cheap and classroom-safe
  • Groups are named by level or colour, never by a child

Works with

Lund Studio products only. Cass 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 Cass 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.