My Take
HHMI Biointeractive is one of the best tools out there for introducing and extending knowledge in IB Biology (and MYP Science), with highly engaging, short videos, interactives, lesson plans and data sets. It can be used to introduce new topics or to extend thinking, and is easy enough to navigate for student-led inquiries. It is well organised with a lot here to connect to the curriculum, allowing learners to see science in action and put a context to the content. There is so much here, it could take a long time to sort out, and so their teacher resources are welcome. You could spend a full day in PD with colleagues using it to plan lessons and curriculum. One thing I'd love to see is a curriculum-to-resource map for the IB Biology course (or other courses), which would make navigating this amazing resource even quicker.
How I Use It
I've been using HHMI Biointeractive as a tool for IB Biology for many years, but the recent updates have been excellent. Their videos, prompts, interactives and datasets are perfect for the IB Biology syllabus (and for upper years MYP). We used them as class clips, group discussions/challenges and ways to challenge and extend thinking with connection to the curriculum. I have often posted links to them on my site i-Biology.net.