Step by Step

This QR has been sent to the English teacher office. Scan it to unlock it and see what it is about

So now, every time you solve the mystery, you'll receive a picture and another QR to unlock another message like this one

Once you pass all the tests and receive all the images related to a woman, you'll have to relate them by using this site to look for her identity and write a brief summary about her contribution. 

Then you'll record the Blabbesteps like in this example* and finally the secret mission will be revealed!

*Nota: Ejemplo alojado en el blog de la compañera Cayetana Álvarez