Flashcard classes

Josiah has been attending flashcard classes for a month now. The method used in the class is pioneered by world renown Dr Glenn Doman. I'm not sure if he enjoys it. Everytime we send him there, he will scream and cry at the door even before entering the classroom. The only time he did not cry was during the first class when I attended with him. He thoroughly enjoyed it and made new friends with the older children there. But after that, it was all screams and cries. I wonder if it because the teacher is strict or he has somehow developed an attachment to us. Even in church nowadays he doesn't want to be carried by other people and prefers to be with hubby or me. I do hope he will grow out of it soon. He used to be so people friendly and anyone could carry him.
Josiah still has only 2 bottom incisors. I'm getting a little bit worried about his teething progress though I know I shouldn't. It will come eventually. He's also been vomiting and we don't know what is the cause of it. He seems to understand more things now too. Whenever I say 'call me' he will promptly reply 'ma ma!'. It is the most wonderful words to my ears. Even when hubby asks him to call him, Josiah will reply 'ma ma!'. He also recognises spoon, plate, cup, lantern when we ask him to show it to us. Whenever he sees fish on the TV or books, he goes 'shh' and he also goes 'woof-woof' whenever he sees a dog. He is getting smarter:)