sorry what i meant by double class was actually taking 2 classes con concurrently which i don't think will be possible for lower levels. if memory serves me well and the practice hasn't change then most classes below pre-advance tend to end sometime in late October. after that you have the choice of self studying for jlpt 3/4 or going for their prep class. double classes where you take the normal progressive classes and the prep class is applicable for higher levels i think, pre advance and above like i did last year with pre-advance and jlpt 2 prep.
prep classes are 2hrs and 45 min while duration of normal classes depends on the frequency of the class per week. not sure about the twice a week kind but once week classes are 2 hr 30 min.
i came from full time basic class before switching to part time due to army so i feel that in terms of content i dun think you will lose out. what you do lose out however is the constant exposure every single day to jap which i feel is very crucial if you want to master it (like how people can go japan for 1 year and get jlpt1). in my basic class then, i had people who joined in basic 2 who crashed course the previous year in jlpt4 prep course and what i could observe is that while they still had the same level as all of us, they were just not as confident in conversing and the usage of jap. this is probably due to the minimal lack of exposure, prep course is once a week with no focus on conversations.
prep classes are 2hrs and 45 min while duration of normal classes depends on the frequency of the class per week. not sure about the twice a week kind but once week classes are 2 hr 30 min.
i came from full time basic class before switching to part time due to army so i feel that in terms of content i dun think you will lose out. what you do lose out however is the constant exposure every single day to jap which i feel is very crucial if you want to master it (like how people can go japan for 1 year and get jlpt1). in my basic class then, i had people who joined in basic 2 who crashed course the previous year in jlpt4 prep course and what i could observe is that while they still had the same level as all of us, they were just not as confident in conversing and the usage of jap. this is probably due to the minimal lack of exposure, prep course is once a week with no focus on conversations.