Primary and secondary school children in UK can enter a competition to develop code for two Raspberry Pis connected to the sensor-loaded Astro Pi boards that will be flown to the ISS. They'll be deployed around the ISS to collect data in orbit and send that data back to Earth to the winning teams.
The resources are available at opsy.st/AstroPiResources.
The Astro Pi hardware is available at swag.raspberrypi.org (for about $45.0). The Astro Pi will be used with the Raspberry Pi 1 B+, though it's also compatible with the Raspberry Pi 1 A+, 2 B+, and 2.
The Astro Pi's sensors include a gyroscope, accelerometer, magnetometer, temperature sensor, barometric pressure sensor, and a humidity sensor as well as visible light or infared (Pi NoIR) cameras, five-button joystick, 8x8 RGB LED matrix display, additional function push buttons, and real-time clock with backup battery (details at astro-pi.org/hardware).