Formal:
* מה אנו לומדים היום? (Ma anu lomedim hayom?) - This is the most literal translation, emphasizing the "we" aspect.
* האם אנו לומדים היום? (Im anu lomedim hayom?) - This translates to "Are we learning today?" and is more formal.
Informal:
* מה לומדים היום? (Ma lomedim hayom?) - This is a more casual way of asking, omitting the "we."
* מה יש לנו היום? (Ma yesh lanu hayom?) - This literally translates to "What do we have today?" and is a very common way to ask about the lesson for the day.
Using the verb "to study":
* האם אנחנו לומדים היום? (Im anachnu lomedim hayom?) - This translates to "Are we studying today?" and is more general.
The best choice depends on the specific context and the level of formality you want to use.