When using a Chromebook for standardized testing there is no need to log in. Click the Apps button at the bottom of the login screen and select the desired test. From there, follow instructions for the specific test which should be located in the testing manual.
Some computer labs contain Chromeboxes. These labs will have the computers attached to the back of the screen. Use the procedures for Chromebooks when working in these labs.
For TELPAS testing, the testing application is called TestNav. Searching for TELPAS is unlikely to return any results.
When using a lab computer for standardized testing, you must log in with the credentials below. From there, locate the desired test icon on the desktop. If no shortcut appears on the desktop, open the start menu and search for the test there.