K-12 Teacher Skills is a collection of reusable agent skills and evaluation rubrics for creating and adapting classroom materials. Teachers use it to make standards-aligned lessons, prepare instruction, and check student understanding, including through Claude for Teachers. The catalogue lists the project’s skills, plugin, and MCP integrations.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add anthropics/k12-teacher-skills --skill k12-lesson-plan-creationgit clone --depth 1 https://github.com/anthropics/k12-teacher-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/anthropics/k12-teacher-skills/k12-lesson-plan-creation)<a href="https://agentmods.dev/skills/anthropics/k12-teacher-skills/k12-lesson-plan-creation"><img src="https://agentmods.dev/badge/skills/anthropics/k12-teacher-skills/k12-lesson-plan-creation/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/anthropics/k12-teacher-skills/k12-lesson-plan-creation"><img src="https://agentmods.dev/badge/skills/anthropics/k12-teacher-skills/k12-lesson-plan-creation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00224 | $0.02926 |
| Opus 5.5 | $0.00090 | $0.01170 |
| Sonnet 5.5 | $0.00045 | $0.00585 |
| Haiku 4.5 | $0.00022 | $0.00293 |
Grade A, and why
k12-lesson-plan-creation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.
K-12 Lesson Planning
Paths here (references/…, rendering/…) are relative to this SKILL.md's folder; use absolute
paths.
Produces a teacher-ready, standards-aligned lesson plan + student-facing materials + teacher observation template as editable, printable documents in a single output turn — Claude Docs and Design pages when this conversation can make Design pages, Word documents otherwise. Each subject has its own pedagogy and output mapping — these live in subject-specific reference files. This skill routes to the right one. Works with or without the Learning Commons Knowledge Graph.
"The teacher" throughout this skill is the user you are talking with — the same person, never a third party. "Teacher-facing" names a document's audience: that user, as opposed to their students.
Keeping the teacher posted
Once the teacher's path is set (the draft offer answered), say in one or two sentences what you're about to do (e.g. "I'll look up the standard and pull supporting ideas from curriculum lessons, then build your lesson plan, student materials, and observation template.").
When a task-list or to-do tool is available, also outline this skill's steps there so the teacher can watch them check off; the only reason to skip this is that no such tool exists in this conversation.
Teacher language only — name what the teacher is getting, never tool names, file names, "JSON", "rendering", or "artboards." Say "Word document" if making Word docs; otherwise, say "your documents" or "pages." The same goes for an error: say the documents couldn't be made, not that a script failed.
Step 0 — Route (silent, before anything else)
-
Subject. Determine the subject of the requested lesson from the prompt and any prior conversation:
- math — arithmetic, fractions, geometry, algebra, calculus, statistics, CCSS-M codes, IM (Illustrative Mathematics)
- ela — reading, writing, phonics, literature, comprehension, vocabulary, CCSS-ELA codes (RL/RI/RF/W/L)
- science — phenomena, NGSS Performance Expectations, biology/chemistry/physics/earth science, OpenSciEd
- social_studies — history, civics, geography, economics, C3 inquiry arc, state social-studies standards
What ships with it
18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- LICENSE 11 KB
- references/ela.md 14 KB
- references/example_lesson.json 21 KB
- references/learning-commons-kg.md 9.9 KB
- references/lesson-json.md 12 KB
- references/math.md 12 KB
- references/NOTICE 294 B
- references/output.md 9.4 KB
- references/science.md 18 KB
- references/social_studies.md 13 KB
- rendering/claude-artifact.md 9.7 KB
- rendering/docx.md 1.8 KB
- scripts/lesson_common.py 33 KB runs code
- scripts/render_all.sh 2.1 KB runs code
- scripts/render_documents.py 4.6 KB runs code
- scripts/render_lesson_docx.py 25 KB runs code
- scripts/render_lesson_html.py 17 KB runs code
- scripts/theme.css 5.2 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 231 lines · 224 tokens per session scan A c4ed0b8cf2ba
k12-lesson-plan-creation is a skill published in the GitHub repository anthropics/k12-teacher-skills (595 stars, last pushed 14d ago), licensed Apache-2.0. It adds 224 tokens to every session and 2,926 once invoked, about $0.0009 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-26.
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