Yes. Chewing kava root whether fresh or dry works great. It is extremely likely to have been the 1st method ever used in any case but we won't go in to detail.
There was also the belief that saliva enhanced the active constituents in kava, but that is unlikely.
Also, long ago in societies where kava is traditionally consumed it was preparred by chewing and straining...often by children for the adults.
So I will add here my long held theory [since there is evidence that kava use focuses attention, enhances memory]--
At least in pre-outside contact Hawai'i there was no written language however there were/are incredibly long, historic chants which have been translated
now, historical, creationist chants among them. Could the remarkable memories be a result of chewing 'awa for the adults? Focusing attention.