Here's a NO TECH idea to stimulate creative thought and higher-level thinking skills. This should make you feel your brain working hard. I think it can be adapted for various ages.
In the course Inquiry in the Arts that I co teach, our first assignment is for the adult students to find a junk shop item that they can use in teaching multiple lessons. They need to think about how many of the multiple intelligences can be reached by the object and how well it can be integrated into all subject areas. Students are at first scared and then get very stimulated as they allow their brains to think outside the box.
It seems like our math "Home Links" definitely employ the spaced repetition mentioned here. They are exposed to the same concepts repeatedly over a long period of time. However, interleaving is not incorporated in the Home Links, as the types of problems our students are asked to complete are all the same in each section.
I would love to learn more about "Mind, Brain and Education" methods. I think this could really help up, as we make curricular and instructional decisions in the coming years.