do we have class today vs is the lecture in today

Some examples from the web:

• What do you say we have class outside today?
• Anyway, I have sent an email telling everyone that we have class today and I would like you to attend.
• I was very impressed with what you said in English class today.
• Thank you for a great class today, ladies.
• At least I'm not late to class today.
• I totally blew at class today.
• She gave herself an STD test in science class today.
• She gave herself an STD test in science class today.
• I'd like to welcome two new members of the class today...
• Mr. Bensknam asked me to stay out of class today.
• I actually learned something in my Spanish class today.
• I saw how you were in class today.
• I registered for class today over at Truman.
• So your brother left these in class today.
• Three things you saw on your way to class today.
• You'll have to teach class today.
• Please excuse Ashley Davies from class today. for an appointment with...
• Gloria, you should've seen bill in gym class today.
• I'm glad someone showed up to class today.
• Max drew this in our class today.

Some examples from the web:

• I forgot to get the lecture in handout today?
• I mean, I forgot to get the handout in lecture today.
• That was a great lecture today.
• So it was cool seeing you lecture today.
• I can't listen to another lecture today.
• Mister Campbell was only pointing out to his colleagues how analogous certain aspects of the front-page article regarding the generation of electrical impulses are to the subject of your lecture today.
• Well, you know, there's this lecture today that I was going to see.
• I do not intend to give a lecture here today about climate change because we have rehearsed this issue many, many times in Parliament.
• Come and give me a kiss, please. I got a big lecture today.
• You have a special lecture to attend today.
• We're giving a lecture at Berkeley later today.
• Today's lecture will cover come uppance.
• Today's lecture's on compromise?
• Well, today's lecture is on the forensics of cold cases.
• Okay, that's the end of today's lecture.
• If you have any questions about today's lecture, my office hours are this afternoon from 3:00-5:00.
• Thank you for all coming to today's lecture by Dr. Phillip Weber, who is our guest today at our hospital to talk about headaches.
• How many people were you expecting to today's lecture?
• Is the lecture part and parcel with the humiliation?
• But I don't really have a lecture for you today