The Tutor2u Covid-19 presentations had a very good circular flow diagram by Richard Baldwin from VoxEU.org. I have used it in my teaching this week – great for NCEA Level 2 Growth standard and A2 Unit 4.
Here is a great set of revision videos by Geoff Riley of Tutor2u. They cover a range of macro and micro topics for AS and A2 Level economics. Most of them are around 8 minutes long and he uses the powerpoint slides very effectively so you get his oral contribution plus the key points on the presentation slides. Well worth a look and you are bound to find them very useful as exams approach. Below is the video on the Circular Flow.