Here you can find detailed lesson plans videos for an introduction, troubleshooting and information about what we have put in our micro:bit kits. It should be a good place for teachers new to the micro:bit to get started.
Code examples, curricular links, and project ideas using Micro:Bits, Makecode blocks, and some peripherals. This website is in beta until the Feb 1-2 2019 conference and (spoiler alert) will be used in the Micro:Bit Deep Dive session. The website contains many embedded Makecode examples, so it is somewhat slow.
This slide deck is an overview of Micro:Bits and an introduction to other processor boards such as Circuit Playground Express, Arduino Uno, and Adafruit Gemma. There are many resource links. The focus is using Makecode block coding in as many areas as possible. This was presented at VINLearn #3.