The licensed way to take it is with the seven day break every month. But you can take Nordette back to back, which is called stacking. There are benefits to taking the pill like this.
Firstly, it’s easier to take the pill every day (because you don’t have to be mindful of a break) so it edges you closer to ‘perfect use’. It can also stop you from having a period (withdrawal bleed) each month, which some women might prefer. But it’s not recommended that you do this without consulting a clinician first.