diff --git a/javascript/100_aggregation_pipeline_match.ipynb b/javascript/100_aggregation_pipeline_match.ipynb
index 44789b4..2a8ed6c 100644
--- a/javascript/100_aggregation_pipeline_match.ipynb
+++ b/javascript/100_aggregation_pipeline_match.ipynb
@@ -222,6 +222,103 @@
     " });"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "fc634597",
+   "metadata": {},
+   "source": [
+    "# Limit and Count documents\n",
+    "\n",
+    "## Show only 5 books"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6aae4ffc",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "const showOnly5Books = { $limit: 5 };\n",
+    "const projection = { $project: \n",
+    "    {\n",
+    "      _id: 0,\n",
+    "        title: 1,\n",
+    "        theAuthors: \"$authors.name\", // we're adding this field to show the authors' names using a expression\n",
+    "        genres: 1\n",
+    "    }\n",
+    "};\n",
+    "\n",
+    "const pipeline = [showOnly5Books, projection];\n",
+    "\n",
+    "const cursor = await books.aggregate(pipeline);\n",
+    "\n",
+    "await cursor.forEach((b) => {\n",
+    "  console.log(b);\n",
+    "});\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1546e8b9",
+   "metadata": {},
+   "source": [
+    "## Count all books"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3212e91f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "const countBooks = { $count: \"totalBooks\" };\n",
+    "\n",
+    "const pipeline = [countBooks];\n",
+    "\n",
+    "const cursor = await books.aggregate(pipeline);\n",
+    "\n",
+    "await cursor.forEach((b) => {\n",
+    "  console.log(b);\n",
+    "});"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1ccf064b",
+   "metadata": {},
+   "source": [
+    "## Sorting"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f080a8ef",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "const showOnly5Books = { $limit: 5 };\n",
+    "const projection = { $project: \n",
+    "    {\n",
+    "      _id: 0,\n",
+    "        title: 1,\n",
+    "        theAuthors: \"$authors.name\", // we're adding this field to show the authors' names using a expression\n",
+    "        genres: 1\n",
+    "    }\n",
+    "};\n",
+    "const sortByName = { $sort: { title: 1 } };\n",
+    "\n",
+    "const pipeline = [showOnly5Books, projection, sortByName];\n",
+    "\n",
+    "const cursor = await books.aggregate(pipeline);\n",
+    "\n",
+    "await cursor.forEach((b) => {\n",
+    "  console.log(b);\n",
+    "});\n"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "f5ca6684",
@@ -237,7 +334,7 @@
    "source": [
     "### Find books with more than 2 available copies.\n",
     "\n",
-    "[Solution here](https://mongodb-developer.github.io/sql-to-query-api-lab/docs/aggregation/match-project#-1-find-books-with-more-than-2-available-copies)"
+    "[Solution here](https://mongodb-developer.github.io/aggregation-pipeline-lab/docs/simple-queries/project#-1-find-books-with-more-than-2-available-copies)"
    ]
   },
   {
@@ -257,7 +354,7 @@
    "source": [
     "### Find books with more than 2 available copies. Return only book titles and publication year.\n",
     "\n",
-    "[Solution here](https://mongodb-developer.github.io/sql-to-query-api-lab/docs/aggregation/match-project#-2-find-books-with-more-than-2-available-copies-return-only-book-titles-and-publication-year)"
+    "[Solution here](https://mongodb-developer.github.io/aggregation-pipeline-lab/docs/simple-queries/project#-2-find-books-with-more-than-2-available-copies-return-only-book-titles-and-publication-year)"
    ]
   },
   {
diff --git a/javascript/101_aggregation_pipeline_arrays.ipynb b/javascript/101_aggregation_pipeline_arrays.ipynb
index f89516e..79aead9 100644
--- a/javascript/101_aggregation_pipeline_arrays.ipynb
+++ b/javascript/101_aggregation_pipeline_arrays.ipynb
@@ -139,6 +139,66 @@
     "    console.log(`book: ${JSON.stringify(doc)}`);\n",
     "});"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b1b980a9",
+   "metadata": {},
+   "source": [
+    "## $elemMatch"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "fca82b33",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "const result = await books.aggregate([\n",
+    "    { $match: { attributes: { \n",
+    "        $elemMatch: { key: \"edition\", value: \"1st\" } } } \n",
+    "    },\n",
+    "]).toArray();\n",
+    "\n",
+    "result"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "7dc0bb23",
+   "metadata": {},
+   "source": [
+    "## Get only the edition attribute"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2c7b2b77",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "const result = await books.aggregate([\n",
+    "    { $match: { attributes: { \n",
+    "        $elemMatch: { key: \"edition\", value: \"1st\" } } } \n",
+    "    },\n",
+    "    { $unwind : \"$attributes\" },\n",
+    "    { $match: \n",
+    "        {\"attributes.key\": \"msrp\",   \n",
+    "        \"attributes.value\": 9.99} \n",
+    "    },\n",
+    "    {\n",
+    "        $project: {\n",
+    "            title: 1,\n",
+    "            attributes: 1\n",
+    "        }\n",
+    "    } \n",
+    "    \n",
+    "]).toArray();\n",
+    "\n",
+    "result"
+   ]
   }
  ],
  "metadata": {