In order to use the CK-12 FlexBook® textbook system, you will need to have browser cookies enabled in your browser.
To do so, please follow the instructions below:

Internet Explorer (6.0 & 7.0)

1. Select 'Tools' from the top menu.
2. Choose 'Internet Options.'
3. Click the 'Privacy' tab.
4. Move the slider to Medium or Low.
5. Click 'OK'.

Mozilla Firefox (1.5+ & Up)

1. Select 'Tools' from the top menu.
2. Choose 'Options'.
3. Click the 'Privacy' tab.
4. Check the boxes labeled 'Accept cookies from sites' and 'Accept third-party cookies'.
5. Select 'they expire' under the 'Keep until' drop-down menu'.
6. Click 'OK'.

Google Chrome

1. Click the wrench at upper right and click 'Options' from the drop-down menu.
2. Click the 'Under the Hood' tab.
3. Click 'Content Settings' button under 'Privacy' section.
4. Select 'Allow all cookies' under the 'Cookie settings' drop-down menu.
5. Click 'Close'.

Apple Safari

1. Select 'Safari'/'Edit' from the top menu.
2. Choose 'Preferences'.
3. Click the 'Security' tab.
4. Select 'Always' under the 'Accept Cookies' section.
5. Close 'Preferences' by clicking the 'X' at the upper-right corner of the Preferences box.

Please keep in mind that upgrading your browser or installing new security software or security patches may affect your cookies settings. It is a good idea to double-check browser cookies setting is still enabled if you notice problems when using the CK-12 FlexBook® textbook System.