To log in, go to learn.cac.org to put your email address in the Email entry form, then enter your password and click Log In. See instructions below the Log In graphic for resetting your password if you need to do that:
Once you are in the system you can change your password. Do that by clicking the Account icon on the top of the left-hand navigation menu: 
and choosing Settings. Once in Settings, click Edit Settings on the right side of the page: 
Just under Time Zone in the center of the resulting page you will see “Password:” with a check box. Click that checkbox and you will be able to enter your old password, then your new password.
Be sure to click Update Settings in the lower-middle of the screen when you are done.
Your new password must be at least eight characters and we recommend using mixed case letters, numbers, and a special character to make it secure.