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k12-check-for-understanding

v0.3.0

Create 1-3 item math checks for understanding with misconception-based distractors and next-step teacher guidance.

CodexClaude CodeAgent Plugins1 Skill

By Anthropic / Learning CommonsLicense: Apache-2.01 GitHub starsUpdated 2 weeks ago

Directory evidence

Runtimes
Codex, Claude Code, and Agent Plugins
Parsed components
1 skill or MCP entry
Source updated
Oct 4, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install k12-check-for-understanding for Codex and Claude Code

Installs for the current user
codex plugin marketplace add ShanireZ/Aptinery
codex plugin marketplace upgrade aptinery
codex plugin add k12-check-for-understanding@aptinery

Paste and run these commands in a terminal with Codex. They add and refresh the aptinery catalog, then install this plugin.

Compatibility: the page URL and API slug “k12-check-for-understanding” remain stable.

  • Codex: k12-check-for-understanding@agent-plugin-marketplace → k12-check-for-understanding@aptinery

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/ShanireZ/Aptinery

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/k12-check-for-understanding/.

Plugin files

plugins/k12-check-for-understanding/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── plugin.json
└── skills/k12-check-for-understanding/SKILL.md

Included Skills1

k12-check-for-understandingskills/k12-check-for-understanding/SKILL.md

Creates a Check for Understanding (CFU) for a math topic or standard: 1–3 targeted formative items whose distractors come from documented student misconceptions, plus a teacher guide routing each likely response to a specific next instructional step. Load BEFORE asking any clarifying question about grade, standard, or topic. This skill is for math; for other subjects, help as you normally would and don't mention the skill to the user. Triggers on asks to create, write, generate, or design a check for understanding, formative check, quick check, or exit ticket for a math concept or standard, and on implicit signals like "I need to see who got it before I move on." Not a quiz, test, or practice set — a CFU is read for what it reveals, not scored, so a numbered quiz or a bare answer key is a different job. Does not create a lesson (k12-lesson-plan-creation, which brings its own exit ticket), tier one (k12-lesson-differentiation), or prepare a teacher to teach one (k12-lesson-prep).

Plugin manifests3

plugins/k12-check-for-understanding/.codex-plugin/plugin.json
{
  "name": "k12-check-for-understanding",
  "version": "0.3.0",
  "description": "Create 1-3 item math checks for understanding with misconception-based distractors and next-step teacher guidance.",
  "author": {
    "name": "Anthropic / Learning Commons",
    "url": "https://github.com/anthropics/k12-teacher-skills"
  },
  "homepage": "https://github.com/ShanireZ/Aptinery",
  "repository": "https://github.com/ShanireZ/Aptinery",
  "license": "Apache-2.0",
  "keywords": [
    "agent-skills",
    "education",
    "k12",
    "formative-assessment",
    "math"
  ],
  "skills": "./skills/",
  "interface": {
    "displayName": "K-12 Check for Understanding",
    "shortDescription": "Build misconception-aware formative math checks",
    "longDescription": "Create a focused 1-3 item math check for understanding plus teacher guidance that maps likely responses to specific next steps.",
    "developerName": "Anthropic / Learning Commons",
    "category": "Education",
    "capabilities": [
      "Interactive",
      "Read",
      "Write"
    ],
    "websiteURL": "https://github.com/ShanireZ/Aptinery",
    "defaultPrompt": [
      "Create a math check for understanding for this standard.",
      "Build a short formative check for this math concept."
    ],
    "brandColor": "#2563EB",
    "screenshots": []
  }
}
plugins/k12-check-for-understanding/.claude-plugin/plugin.json
{
  "name": "k12-check-for-understanding",
  "version": "0.3.0",
  "description": "Create 1-3 item math checks for understanding with misconception-based distractors and next-step teacher guidance.",
  "author": {
    "name": "Anthropic / Learning Commons",
    "url": "https://github.com/anthropics/k12-teacher-skills"
  },
  "homepage": "https://github.com/ShanireZ/Aptinery",
  "repository": "https://github.com/ShanireZ/Aptinery",
  "license": "Apache-2.0",
  "keywords": [
    "agent-skills",
    "education",
    "k12",
    "formative-assessment",
    "math"
  ],
  "skills": "./skills/"
}
plugins/k12-check-for-understanding/plugin.json
{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "k12-check-for-understanding",
  "version": "0.3.0",
  "description": "Create 1-3 item math checks for understanding with misconception-based distractors and next-step teacher guidance.",
  "author": {
    "name": "Anthropic / Learning Commons",
    "url": "https://github.com/anthropics/k12-teacher-skills"
  },
  "homepage": "https://github.com/ShanireZ/Aptinery",
  "repository": "https://github.com/ShanireZ/Aptinery",
  "license": "Apache-2.0",
  "keywords": [
    "agent-skills",
    "education",
    "k12",
    "formative-assessment",
    "math"
  ],
  "skills": "./skills/"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[k12-check-for-understanding on Agent Plugins Marketplace](https://pluginsmp.com/plugins/k12-check-for-understanding)