With voltage dividers being one of the hardest concepts for a lot of people learning electronics, we developed the PHYS:BIT for micro:bit to help the educator as well as the student.
The major benefits of the PHYS:BIT system in the classroom are, classroom management as there are less small items to keep a track of, and consistency across the classroom as all the boards are the same.
You get the PHYS:BIT main board, a 5 resistor divider board and a universal board for mounting two of your own components. The board is designed to supply 3 volts across the circuit, and an input to your micro:bit can be used to measure the voltage at any of the test points on the daughter boards. The universal board could be used to show the voltage change on a charging capacitor, or the voltage potential created using 2 different resistor values. The boards are fully assembled, and are ready to go, all you have to do is add a micro:bit, and code.
We are in the process of getting a lesson plan drawn up for this product, and will make this available as soon as we can.