Rather than shouting over your class hoping they might stop talking, use one or more of the attention-getters.
I will provide you with some examples of attention-getters that can help you to manage your class and grab students' attention when switching from an activity to another.
๐๐๐ซ๐ ๐๐ซ๐ ๐ฌ๐จ๐ฆ๐ ๐ฌ๐ฎ๐ ๐ ๐๐ฌ๐ญ๐ข๐จ๐ง๐ฌ: