what did you get on the class vs what did you get in the class

Some examples from the web:

• Class president and the class clown.
• This product belongs to the class of dermocorticoids.
• Tracleer tablets belong to the class of medicines called endothelin receptor antagonists.
• Half the class is failing English.
• - I'm dropping the class.
• Aliskiren belongs to the class of direct renin inhibitors and hydrochlorothiazide to the class of thiazide diuretics.
• The Class A train protection system is ERTMS/ETCS whilst the Class A radio system is GSM-R.
• The STMs, which enable the Class A on-board system to operate over Class B infrastructure, are subject to the Class B requirements.
• He never registered for the class.
• The class is out there, ladies.
• Get out of the class, please.
• Get out of the class, please.
• He's handsome with the class of a young Robert Duvall.
• So I will get the class registration.
• No, I want us to take the class together.
• The rest of the class will be here shortly.
• The rest of the class will be here shortly.
• I'm no longer number one in the class.
• So, queen of the class 15 years after her reign.
• I am number one in the class.

Some examples from the web:

• Class president and the class clown.
• This product belongs to the class of dermocorticoids.
• Tracleer tablets belong to the class of medicines called endothelin receptor antagonists.
• Half the class is failing English.
• - I'm dropping the class.
• Aliskiren belongs to the class of direct renin inhibitors and hydrochlorothiazide to the class of thiazide diuretics.
• The Class A train protection system is ERTMS/ETCS whilst the Class A radio system is GSM-R.
• The STMs, which enable the Class A on-board system to operate over Class B infrastructure, are subject to the Class B requirements.
• He never registered for the class.
• The class is out there, ladies.
• Get out of the class, please.
• Get out of the class, please.
• He's handsome with the class of a young Robert Duvall.
• So I will get the class registration.
• No, I want us to take the class together.
• The rest of the class will be here shortly.
• The rest of the class will be here shortly.
• I'm no longer number one in the class.
• So, queen of the class 15 years after her reign.
• I am number one in the class.