All student passwords need resetting every 160 days which means that any students that have not reset their passwords since the start in September may find their access to Moodle, Office and other college systems stopping over the coming few weeks.
There are links to self reset options from Moodle and the College website as well as a guide here. New password needs to be 10 characters including UPPER and lower case, number and one non alpha numerical character like $ or &. For example Cl&ph@m$W4 would work but it must not be one that you've used in the last 10 resets.
The easiest place to reset is here if your password has not yet expired.
If at any point since September you've reset or had your password reset then you'll be fine for 160 days from the reset date.