Data deletion upon account closure^{2, 3}Email addressShare with linked accounts that have access to same student or class (for increased transparency and security of student data)Data deletion upon account closure^{2, 3}Account settings: account type, email preferences, time zone, etc.Create progress reports and maintain data preferencesUpon account closure^{2, 3}Electronic identifiers: account change timestamps, version number, etc.Technical support and account securityUpon account closure^{2, 3}Single-sign-on provider and hashed IDAccount access using optional 3rd party credentialUpon request or account closure^{2, 3}IP addressDetermine time zone upon sign-upNot storedHashed IP addressAccount securityAfter 1 year or upon account closure^{2, 3}TeacherHashed IP addressExpedite classroom setup on multiple devicesAfter 24 hoursClass name, class end date, student namesCreate progress reports and facilitate program usageUpon request, account closure³, or one year after class end date.