# OS & DEVICES

Screen resolutions of 1024x768 or above are recommended for optimal viewing.

## CONNECTIVITY

- Chromebook OS latest version  
- OS 10.10 or higher  
  
- If your networks use caching/proxy, make sure these servers have a bypass rule for ChalkTalk’s websites.  
- Access must be allowed to ports 80 and 443 to enable all components of the site to work properly. The users must have access to the list of valid URLs (see Web Filtering section).

## BROWSERS

- **Google Chrome**: To check latest version click the menu in the top right and go to Help > About Google Chrome

### Browser Requirements

- Cookies: All web browsers must have cookies enabled.  
- Pop-Up Blockers: if installed, must be disabled or an exception must be created for ChalkTalk URLs.  
- JavaScript: must be enabled.  
- Security Level Settings: Default settings supported.  
- Images: Default settings are supported; Image Display must not be turned off.  
- Privacy Settings: Default settings supported; Maximum Privacy Setting (disabling cookies) not supported.  
- Character Set: It is expected that Unicode UTF-8 is set as the default character set.

## WEB FILTERING

Locations that use a web filtering device, service, or other domain blocking mechanism should allow access to the following domains:

### Core functionality

- accounts.google.com  
- drive.google.com  
- \*.chalktalk-api.com  
- \_.amazonaws.com/chalktalk-media/_  
- play.google.com  
- \*.googleusercontent.com  
- docs.google.com  
- \*.learnosity.com  
- files.masteryconnect.com  
- cdn.jsdelivr.net/npm/mathjax

### Chat support

- \*.intercom.io  
- \*.intercomcdn.com

### Monitoring and Security

- browser.sentry-cdn.com  
- \*.datadoghq.com  
- \*.bootstrapcdn.com  
- \*.wp.com  
- \*.mixpanel.com  
- \*.googleapis.com  
- \*.gstatic.com  
- \*.google.com

## WHITELISTING CHALKTALK EMAILS

Webmail systems should bypass spam filters for messages received from the following domains or IP ranges:

### Instructions for Office 365

- Domains: Configure anti-spam policies in Office 365.  
  
- chalktalk.academy

### Instructions for G Suite (Gmail)

- G Suite Admin Help-Working with spam filters.