Little by little, I have been learning how native English speakers learn and understand the Japanese language. I also found that I need to slow down the pace of lesson and make sure that students fully understand the content of the target language.
As a consequence of intentionally spending more time on each activity, I think that the students grasp the grammatical structure of phrases and sentences, which might be an essential part for adult learners.
The classroom usually has a U-shape desk arrangement for 20 seats. But today, there were two column arrangements for each 10. We used one column for ten of us. It actually worked very well. I was able to stand and talk closer to the students than usual. They looked more relaxed, and I was a bit surprised about how desk formations affect the class environment.