diff --git a/aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-teams.ts b/aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-teams.ts
index e1657ce979..d04a299576 100644
--- a/aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-teams.ts
+++ b/aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-teams.ts
@@ -57,7 +57,7 @@ export class GithubTeams {
   /**
    * Check whether the given username is a member of the teams specified by the team slugs.
    * @param username The username to check for in the teams.
-   * @param teamSlugs A collection of slugs that represent the teams to check for the the username.
+   * @param teamSlugs A collection of slugs that represent the teams to check for the username.
    * @returns a Promise that resolves to `true` if the usernane is a member of at least one of the specified teams.
    */
   public async isMemberBySlug(username: string, teamSlugs: string[]): Promise<boolean> {
diff --git a/aio/content/guide/property-binding.md b/aio/content/guide/property-binding.md
index d85778ef61..5e5631ed5f 100644
--- a/aio/content/guide/property-binding.md
+++ b/aio/content/guide/property-binding.md
@@ -45,7 +45,7 @@ In most cases, the target name is the name of a property, even when it appears t
 In this example, `src` is the name of the `<img>` element property.
 
 The brackets, `[]`, cause Angular to evaluate the right-hand side of the assignment as a dynamic expression.
-Without the brackets, Angular treats the the right-hand side as a string literal and sets the property to that static value.
+Without the brackets, Angular treats the right-hand side as a string literal and sets the property to that static value.
 
 <code-example path="property-binding/src/app/app.component.html" region="no-evaluation" header="src/app.component.html"></code-example>
 
diff --git a/aio/content/guide/router-tutorial-toh.md b/aio/content/guide/router-tutorial-toh.md
index 09a2a9d0e0..00f64c745d 100644
--- a/aio/content/guide/router-tutorial-toh.md
+++ b/aio/content/guide/router-tutorial-toh.md
@@ -2440,7 +2440,7 @@ Note the following three important points:
 The `CrisisDetailResolverService` doesn't inherit from a base class.
 The router looks for that method and calls it if found.
 
-1. The router calls the resolver in any case where the the user could navigate away so you don't have to code for each use case.
+1. The router calls the resolver in any case where the user could navigate away so you don't have to code for each use case.
 
 1. Returning an empty `Observable` in at least one resolver will cancel navigation.
 
diff --git a/aio/src/app/custom-elements/elements-loader.spec.ts b/aio/src/app/custom-elements/elements-loader.spec.ts
index bdc0e5cc20..5ef5c59f35 100644
--- a/aio/src/app/custom-elements/elements-loader.spec.ts
+++ b/aio/src/app/custom-elements/elements-loader.spec.ts
@@ -194,7 +194,7 @@ describe('ElementsLoader', () => {
       expect(definedSpy).not.toHaveBeenCalled();
     }));
 
-    it('should fail if defining the the custom element fails', fakeAsync(() => {
+    it('should fail if defining the custom element fails', fakeAsync(() => {
       let state = 'pending';
       elementsLoader.loadCustomElement('element-b-selector').catch(e => state = `rejected: ${e}`);
       flushMicrotasks();
diff --git a/aio/src/app/shared/select/select.component.spec.ts b/aio/src/app/shared/select/select.component.spec.ts
index d8d4d04cc5..b7ed8b5dc2 100644
--- a/aio/src/app/shared/select/select.component.spec.ts
+++ b/aio/src/app/shared/select/select.component.spec.ts
@@ -93,7 +93,7 @@ describe('SelectComponent', () => {
     beforeEach(() => {
       host.options = options;
       host.showSymbol = true;
-      getButton().click(); // ensure the the options are visible
+      getButton().click(); // ensure the options are visible
       fixture.detectChanges();
     });
 
diff --git a/aio/tools/examples/UPDATING.md b/aio/tools/examples/UPDATING.md
index a0a4a66d92..beb3612d95 100644
--- a/aio/tools/examples/UPDATING.md
+++ b/aio/tools/examples/UPDATING.md
@@ -24,7 +24,7 @@ Any necessary changes to boilerplate files will be done automatically through mi
 > You have to make these changes (if any) manually.
 > Again, the [angular-cli-diff](https://github.com/cexbrayat/angular-cli-diff) repo can be a useful resource for discovering changes between versions.
 
-- In the [shared/boilerplate/cli/](./shared/boilerplate/cli) directory, run the following commands to migrate the the project to the current versions of Angular CLI and the Angular framework (updated in previous steps):
+- In the [shared/boilerplate/cli/](./shared/boilerplate/cli) directory, run the following commands to migrate the project to the current versions of Angular CLI and the Angular framework (updated in previous steps):
   ```sh
   # Ensure dependencies are installed.
   yarn install