Formal:
* E komo mai i ke kula. (eh koh-moh my ee keh koo-lah) - This is a very formal way to say "Welcome to class," literally meaning "Come in to the school."
* E komo mai i ka papa. (eh koh-moh my ee kah pah-pah) - This means "Welcome to the class" and is also quite formal.
Informal:
* Aloha! E komo mai. (ah-loh-ha! eh koh-moh my) - This means "Hello! Welcome in" and is a friendly and informal greeting.
* E komo mai i ka papa! (eh koh-moh my ee kah pah-pah) - This means "Welcome to class!" and is a more informal way of saying it.
Other Options:
* E komo mai i ko mākou papa. (eh koh-moh my ee koh mah-ow-koo pah-pah) - This means "Welcome to our class" and is a more personal way of saying it.
* E komo mai, e nā hoa. (eh koh-moh my, eh nah ho-ah) - This means "Welcome, friends" and is a very friendly and welcoming greeting.
Remember: The best way to say "Welcome to class" in Hawaiian will depend on the specific situation. Consider the level of formality and your relationship with the students when choosing your greeting.