To unlock Circulate on the junior version of Reading Cloud, log into your library system as an administrator. Click on the option for 'Circulate' and you will see an 'Unlock Circulate' slider on the right hand side. Move this slider to the right to unlock circulate on this machine.
This will be saved as a cookie within the browser you are using.
If the cookies are cleared regularly (causing Circulate to become locked again), you will need to carry out the steps again or speak to your school IT team to see if the browser settings can be changed to keep the cookie in place.