Yowling and overexcited at puppy school

[Kickity-Flippity]

We just had our first puppy school day with Rocky! Unfortunately m, he is VERY energetic and would not stop barking/yowling/whining or pulling on his leash to meet other puppies! Although I’m happy he isn’t being aggressive, he has also attempted to pounce and ends up scaring off the other dogs .

We’re not condoning the behaviour, of course, but it’s just really frustrating and I was wondering if anyone knew how to prevent this behaviour?