"To take the class" means to attend or participate in a particular course or educational session where you will learn new information or skills. Full definition
Plus, taking a class helps parents meet other parents who are looking forward to their first child. (babygaga.com)
Women who do not currently borrow e-books from libraries are more interested than men in taking classes on how to use handheld reading devices such as e-readers or tablets. (libraries.pewinternet.org)
Of course we did not and I was not interested in taking classes with someone (and being financially committed to this) I was not interested in. (datinggoddess.com)