What is the indirect object in sentence Mrs. Buenaventura reads class an interesting story?

The indirect object in the sentence "Mrs. Buenaventura reads the class an interesting story" is the class.

Here's why:

* Direct object: The direct object is what is being acted upon. In this case, it's the "story".

* Indirect object: The indirect object receives the direct object. Here, the class is receiving the story being read.

You can test this by rephrasing the sentence:

"Mrs. Buenaventura reads an interesting story *to the class*."