This app allows you to make a set of instructions, step by step, using photos and short videos (using videos which are under 1 minute). It seems to be popular for making little recipe instructions or DIY projects but I think it would also be perfect for using in class to give instructions to your learners. Having your instructions recorded allows you the freedom that flipped learning gives you. Your learners can access the instructions 24/7 and at the time that suits their programme.
The guides are public once you have published them so be aware that anyone can see your guides. However, as a method of getting instructions to your students, they look clean and are easy to prepare. It would be easy to embed them into your class blog or get them directly to your learners using email or Google Classroom.
Here is one example of a Snapguide.
As well as the set of step by step instructions, there is a "Supplies" page in each Snapguide which allows you to tell the students what equipment, devices, and other necessities are needed.
You can also use a web version to make a Snapguide but the web version does not currently have the ability to add videos, like the ipad or iphone has. Get started by creating an account.
Here is a quick guide from me to using Snapguide on your phone or ipad.