edit showcase notebook

source/Showcase/showcase.ipynb

 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9774c4db-446a-4736-9b81-3147f7f2bb86",
+   "metadata": {
+    "jupyter": {
+     "outputs_hidden": true
+    }
+   },
+   "source": [
+    "# Showcase of nbgrader Features"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "fd8395f8-7c55-4ff3-9f65-305fb14c6c87",
+   "metadata": {},
+   "source": [
+    "## Read-Only Cells"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "317bf900-a253-427c-b462-f46906223f16",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "id": "2c76fb6c-c223-4378-8bb8-e93dc7598942",
+   "metadata": {},
+   "source": [
+    "## Manually graded cells"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a9bc8ade-2bd7-4d2a-a517-b6aee50fc49c",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1011509a-9018-4bcb-9bd6-ab28746312c0",
+   "metadata": {},
+   "source": [
+    "## Automatically graded cells"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "initial_id",
+   "id": "859cec0c-0ed2-48e0-8e3b-a5354b517652",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "id": "977d17b7-9643-42d1-9eb8-5c657a76fa9e",
+   "metadata": {},
+   "source": [
+    "## Quizzes"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3a8fa6dd-8e96-4e34-9e6a-d44d56bf0af1",
    "metadata": {
-    "collapsed": true
+    "nbgrader": {
+     "grade": false,
+     "grade_id": "cell-a48921c47e3b4e5a",
+     "locked": true,
+     "points": 0,
+     "schema_version": 3,
+     "solution": false,
+     "task": true
+    },
+    "tags": []
    },
+   "source": [
+    "#### Quiz\n",
+    "* (SC) What are ungraded quizzes good for?\n",
+    "  + This\n",
+    "  - That\n",
+    "\n",
+    "#### End Quiz"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "49d89943-fcd2-49b8-850c-886b73075a8a",
+   "metadata": {},
    "outputs": [],
    "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.6"
+   "pygments_lexer": "ipython3",
+   "version": "3.11.5"
   }
  },
  "nbformat": 4,