I wouldn't read anything into it, it sounds as though he was just curious and trying to have a conversation with you.
taking twice as many classes as normal.
= 'What classes are you taking this semester?' Possible answer: 'Tomo clases de (ingles, frances, matematicas, geografia, ciencia, etc.)' = 'I am taking classes in (English, French, maths, geography, science, etc.)
by taking English classes
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by taking so many classes (x) in college
Taking classes online has become popular in many places. A lot of people enjoy the convenience offered by taking classes online rather than in a classroom.
Estoy tomando dos clases este semestre
"How many classes are you taking this year?"
cuantas clases tienes en el dia? = how many classes do you have in the day?cuantas clases tienes hoy? = how many classes do you have today?
You will first have to take the basic general education classes. After that, you will be taking many classes in math, computer aided drafting, and building design.
Just English but he is taking French classes.
ESL classes are classes for people who want to learn a second language. Many of the people in ESL classes have English as their secondary language so they are taking it to learn more about it.