diff --git a/setupTests.ts b/setupTests.ts
index 3260e6c..dbf4e01 100644
--- a/setupTests.ts
+++ b/setupTests.ts
@@ -19,3 +19,8 @@ global.FormData = JSDOMFormData
 process.env.BASE_URL = "http://localhost"
 
 enableFetchMocks()
+
+afterAll(() => {
+  jest.restoreAllMocks()
+  jest.resetModules()
+})
diff --git a/show-watcher/notifications/create.ts b/show-watcher/notifications/create.ts
new file mode 100644
index 0000000..1743ff2
--- /dev/null
+++ b/show-watcher/notifications/create.ts
@@ -0,0 +1,21 @@
+interface TackUpNotification<Name extends string, Params> {
+    name: Name
+    params: Params
+    subscriptionJson: any
+    start: () => void
+}
+
+type TackUpNotifications =
+    TackUpNotification<"left to go in class", {
+        classNumber: number,
+        leftToGo: number
+    }> |
+
+
+
+
+
+
+function create<NotificationType>(type: NotificationType["name"], params: NotificationType["params"]) {
+
+}
\ No newline at end of file
diff --git a/show-watcher/notifications/leftToGoInClass.ts b/show-watcher/notifications/leftToGoInClass.ts
new file mode 100644
index 0000000..d93f9ad
--- /dev/null
+++ b/show-watcher/notifications/leftToGoInClass.ts
@@ -0,0 +1,21 @@
+
+function buildLeftToGoInClass({ data }) {
+
+    function buildNotification({ data: }) {
+        const leftToGo = getLeftToGoInClass(data.classNumber)
+        const className = getClassNameFromClassNumber(data.classNumber)
+        return {
+            title: `There are ${leftToGo} left to go in ${className}`
+        }
+    }
+
+    function startWatch() {
+        watchClass({number: data.classNumber}, )
+    }
+
+    return {
+        buildNotification,
+
+    }
+}
+
diff --git a/show-watcher/notify.ts b/show-watcher/notify.ts
new file mode 100644
index 0000000..5a58b30
--- /dev/null
+++ b/show-watcher/notify.ts
@@ -0,0 +1,9 @@
+interface NotificationParams {
+    title: string,
+    badge: 
+}
+
+export default function notify(recipientSubscriptionJSON: any, notification: {
+    title: string,
+    options: NotificationOptions
+}) {}
diff --git a/show-watcher/register.test.ts b/show-watcher/register.test.ts
new file mode 100644
index 0000000..f70b053
--- /dev/null
+++ b/show-watcher/register.test.ts
@@ -0,0 +1,41 @@
+import register from "./register"
+import watch from "./watch"
+import notify from "./notify"
+
+jest.mock("./watch")
+jest.mock("./notify")
+
+const mockedNotify = jest.mocked(notify)
+const mockedWatch = jest.mocked(watch)
+
+const recipientSubscriptionJSON = {
+  endpoint: "https://zombo.com",
+  expirationTime: null,
+  keys: {
+    auth: "O_JFRKmhy3OU9LfpfWeQ8Q",
+    p256dh: "somegoofystring",
+  },
+}
+
+describe("register", () => {
+  beforeEach(() => {
+    mockedWatch.mockImplementation(() => jest.fn())
+  })
+
+  test("starts a watch for the provided event", () => {
+    register({
+      type: "left to go in class",
+      data: {
+        count: 5,
+        class: 2102,
+      },
+      recipientSubscriptionJSON,
+    })
+
+    const watchCallback = mockedWatch.mock.calls[0][0].callback
+
+    expect(mockedNotify).toHaveBeenCalledWith(recipientSubscriptionJSON, {
+      title: "5 left to go in class 2102",
+    })
+  })
+})
diff --git a/show-watcher/register.ts b/show-watcher/register.ts
new file mode 100644
index 0000000..7d99875
--- /dev/null
+++ b/show-watcher/register.ts
@@ -0,0 +1,22 @@
+import notify from "./notify"
+import watch from "./watch"
+
+export default function register({
+  type,
+  data,
+  recipientSubscriptionJSON,
+}: {
+  type: string
+  data: any
+  recipientSubscriptionJSON: any
+}) {
+  function onNotify() {
+    notify(recipientSubscriptionJSON)
+  }
+
+  watch({
+    type,
+    data,
+    callback: onNotify,
+  })
+}
diff --git a/show-watcher/tests/leftToGoInClass.test.ts b/show-watcher/tests/leftToGoInClass.test.ts
new file mode 100644
index 0000000..e8b3681
--- /dev/null
+++ b/show-watcher/tests/leftToGoInClass.test.ts
@@ -0,0 +1,3 @@
+describe("Left to go in class notification", () => {
+  test("")
+})
diff --git a/show-watcher/tests/mockSubscriptionJson.ts b/show-watcher/tests/mockSubscriptionJson.ts
new file mode 100644
index 0000000..e69de29
diff --git a/show-watcher/watch.ts b/show-watcher/watch.ts
new file mode 100644
index 0000000..5f7618f
--- /dev/null
+++ b/show-watcher/watch.ts
@@ -0,0 +1,9 @@
+export default function watch({
+  type,
+  data,
+  callback,
+}: {
+  type: string
+  data: any
+  callback: () => void
+}) {}