How I Use It
I've used this as independent practice for when students get done with classroom activities. The problem is students can click away and luckily donate rice. I do like the face that as you get more correct it changes its difficulty, which adds a component of accountability and competition.
This is another website that lives at the bottom of blooms taxonomy of understanding. Its great because it donates to 3rd world countries. Without this feature this website would lack the essential tools needed to engage students.