The Simple Solutions Approach is Based on Decades of Learning Research

At Simple Solutions, we design all of our products using retrieval, interleaving, and spacing strategies to prepare students for success. These strategies are time-tested and backed by decades of learning research. With our products, students can strengthen their memories, increase academic achievement, build confidence, and raise standardized test scores. Learn more about the research below.

learning research

Downloads from is a hub of research, resources, and teaching strategies based on the science of learning. The organization’s goal is to increase access to rigorous, scientifically-tested strategies to help educators transform teaching and learning.

How to Use Spaced Retrieval Practice to Boost Learning

Interleaved Mathematics Practice

How to Use Retrieval Practice to Improve Learning

Recommended Books

Small Teaching: Everyday Lessons from the Science of Learning

Make it Stick

Powerful Teaching

Articles and Reports

Using Cognitive Science to Boost Learning

Research Commentary: The Effects of Spacing and Mixing Practice Problems

Ask the Cognitive Scientist: Allocating Student Study Time: “Massed” versus “Distributed” Practice

Principles of Instruction

Building Student Confidence and Raising Test Scores in Mathematics

Organizing Instruction and Study to Improve Student Learning