I’ve been experimenting with various camera apps for the iPhone and iPad in the last couple of months, as I build lesson plans for real-world math applications using photography.

Many of the apps use bursting shots and time-lapse, as that is where a lot of cool mathematical concepts lie. These require a steady hand, a tripod, or a stand. Since my budget doesn’t include money for student stands, I decide to spend 5 minutes making a simple free cardboard iPhone holder.

So far it is sturdy, stable, and easy to use. And free.