The phrase "standard class" refers to the basic or regular level of something, without any extra features or upgrades. It is the most common and basic option available. Full definition
This would include standard classes with a teacher and eBooks, to allow for classroom learning through an expert and independent learning outside of class. (bmcmededuc.biomedcentral.com)
On board you'll find 250 standard class seats, housed in a comfortable air - conditioned cabin on the lower deck. (directferries.com)
The use of time and space became less rigid, as did our grade - level differences and standard class sizes. (ascd.org)