diff --git a/CHANGELOG.md b/CHANGELOG.md
index e36c6519..ffb856bd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 
 * [Changelog](#changelog)
+  * [2.24.0](#2240)
   * [2.23.2](#2232)
   * [2.23.1](#2231)
   * [2.23.0](#2230)
@@ -76,6 +77,11 @@
 
 ***
 
+## 2.24.0
+
+* [Issue #159](https://github.com/scrthq/PSGSuite/issues/159)
+  * Added: `Revoke-GSStudentGuardianInvitation` to revoke student guardian invitations (Classroom API)
+
 ## 2.23.2
 
 * Fixed logic issue with Get-GSUsageReport for reports returning no entities where errors would be thrown. Resolved by guarding against acting on `$null` values in the loop.
diff --git a/PSGSuite/PSGSuite.psd1 b/PSGSuite/PSGSuite.psd1
index 11223262..5973ef22 100644
--- a/PSGSuite/PSGSuite.psd1
+++ b/PSGSuite/PSGSuite.psd1
@@ -12,7 +12,7 @@
     RootModule            = 'PSGSuite.psm1'
 
     # Version number of this module.
-    ModuleVersion         = '2.23.2'
+    ModuleVersion         = '2.24.0'
 
     # ID used to uniquely identify this module
     GUID                  = '9d751152-e83e-40bb-a6db-4c329092aaec'
diff --git a/PSGSuite/Public/Classroom/Revoke-GSStudentGuardianInvitation.ps1 b/PSGSuite/Public/Classroom/Revoke-GSStudentGuardianInvitation.ps1
new file mode 100644
index 00000000..f4a94be3
--- /dev/null
+++ b/PSGSuite/Public/Classroom/Revoke-GSStudentGuardianInvitation.ps1
@@ -0,0 +1,102 @@
+function Revoke-GSStudentGuardianInvitation {
+    <#
+    .SYNOPSIS
+    Revokes a student guardian invitation.
+
+    .DESCRIPTION
+    Revokes a student guardian invitation.
+
+    This method returns the following error codes:
+
+    * PERMISSION_DENIED if the current user does not have permission to manage guardians, if guardians are not enabled for the domain in question or for other access errors.
+    * FAILED_PRECONDITION if the guardian link is not in the PENDING state.
+    * INVALID_ARGUMENT if the format of the student ID provided cannot be recognized (it is not an email address, nor a user_id from this API), or if the passed GuardianInvitation has a state other than COMPLETE, or if it modifies fields other than state.
+    * NOT_FOUND if the student ID provided is a valid student ID, but Classroom has no record of that student, or if the id field does not refer to a guardian invitation known to Classroom.
+
+    .PARAMETER StudentId
+    The ID of the student whose guardian invitation is to be revoked. The identifier can be one of the following:
+
+    * the numeric identifier for the user
+    * the email address of the user
+
+    .PARAMETER InvitationId
+    The id field of the GuardianInvitation to be revoked.
+
+    .PARAMETER User
+    The user to authenticate the request as
+
+    .EXAMPLE
+    Revoke-GSStudentGuardianInvitation -StudentId aristotle@athens.edu -InvitationId $invitationId
+
+    .EXAMPLE
+    Import-Csv .\Student_Guardian_List_To_Revoke.csv | Revoke-GSStudentGuardianInvitation
+
+    Process a CSV with two columns containing headers "Student" and "Guardian" and revokes the invites accordingly, i.e.
+
+    |      StudentId       |    InvitationId    |
+    |:--------------------:|:------------------:|
+    | aristotle@athens.edu | 198okj4k9827872177 |
+    | plato@athens.edu     | 09120uuip21ru0ff0u |
+    #>
+    [OutputType('Google.Apis.Classroom.v1.Data.GuardianInvitation')]
+    [cmdletbinding(SupportsShouldProcess = $true,ConfirmImpact = "High")]
+    Param
+    (
+        [parameter(Mandatory = $true,ValueFromPipelineByPropertyName = $true)]
+        [Alias('Student')]
+        [String]
+        $StudentId,
+        [parameter(Mandatory = $true,ValueFromPipelineByPropertyName = $true)]
+        [Alias('Invitation','InviteId','Invite')]
+        [String[]]
+        $InvitationId,
+        [parameter(Mandatory = $false)]
+        [String]
+        $User = $Script:PSGSuite.AdminEmail
+    )
+    Begin {
+        if ($User -ceq 'me') {
+            $User = $Script:PSGSuite.AdminEmail
+        }
+        elseif ($User -notlike "*@*.*") {
+            $User = "$($User)@$($Script:PSGSuite.Domain)"
+        }
+        $serviceParams = @{
+            Scope       = 'https://www.googleapis.com/auth/classroom.guardianlinks.students'
+            ServiceType = 'Google.Apis.Classroom.v1.ClassroomService'
+            User        = $User
+        }
+        $service = New-GoogleService @serviceParams
+    }
+    Process {
+        if ( -not ($StudentId -as [decimal])) {
+            if ($StudentId -ceq 'me') {
+                $StudentId = $Script:PSGSuite.AdminEmail
+            }
+            elseif ($StudentId -notlike "*@*.*") {
+                $StudentId = "$($StudentId)@$($Script:PSGSuite.Domain)"
+            }
+        }
+        foreach ($invId in $InvitationId) {
+            try {
+                if ($PSCmdlet.ShouldProcess("Revoking Guardian Invitation '$invId' for Student '$StudentId'")) {
+                    Write-Verbose "Revoking Guardian Invitation '$invId' for Student '$StudentId'"
+                    $body = New-Object 'Google.Apis.Classroom.v1.Data.GuardianInvitation' -Property @{
+                        State = "COMPLETE"
+                    }
+                    $request = $service.UserProfiles.GuardianInvitations.Patch($body,$StudentId,$invId)
+                    $request.UpdateMask = "state"
+                    $request.Execute()
+                }
+            }
+            catch {
+                if ($ErrorActionPreference -eq 'Stop') {
+                    $PSCmdlet.ThrowTerminatingError($_)
+                }
+                else {
+                    Write-Error $_
+                }
+            }
+        }
+    }
+}
diff --git a/README.md b/README.md
index 7f8a3b9f..1c137bf6 100644
--- a/README.md
+++ b/README.md
@@ -143,14 +143,7 @@ Update-GSSheetValue               Export-GSSheet
 
 [Full CHANGELOG here](https://github.com/scrthq/PSGSuite/blob/master/CHANGELOG.md)
 
-#### 2.23.2
+#### 2.24.0
 
-* Fixed logic issue with Get-GSUsageReport for reports returning no entities where errors would be thrown. Resolved by guarding against acting on `$null` values in the loop.
-
-#### 2.23.1
-
-**This update changes the output of `Get-GSUsageReport` -- please review the output changes before updating if you have scripts that use that function!!**
-
-* Fixed: `Get-GSUsageReport` wasn't displaying critical report information (such as the Entity info) due to Select-Object being hardcoded. Function has been updated to parse the resulting Parameters and Entity info out to the top-level object.
-  * Added: `Flat` switch to specify that the parsed properties match what GAM returns, i.e. `'gmail:num_outbound_unencrypted_emails' = 6`. Normal behavior would be to parse that into an ordered dictionary, i.e. `gmail['num_outbound_unencrypted_emails'] = 6`, so that only `gmail` is seen from the top level object and all relevant report data is captured in the underlying dictionary.
-  * Added: `Raw` switch to allow the raw UsageReportsValue to be returned instead of parsing it out.
+* [Issue #159](https://github.com/scrthq/PSGSuite/issues/159)
+  * Added: `Revoke-GSStudentGuardianInvitation` to revoke student guardian invitations (Classroom API)