Don't just open the page. Read the title and the "In this unit you will learn" box. Google a video related to the theme. For example, if Unit 4 is about Media, watch a 1-minute news clip on YouTube.
Reaching the B2 level is often described as the "plateau" where progress feels slower because you are moving from functional survival to nuanced expression. (B2.1) and Aula Internacional 5 (B2.2) are designed to help you push through this by focusing on three main areas: aula internacional b2