Reuven Feuerstein, Romanian-Israeli psychologist and academic (d. 2014)
Reuven Feuerstein (Hebrew: ראובן פוירשטיין; August 21, 1921 – April 29, 2014) was an Israeli clinical, developmental, and cognitive psychologist, known for his theory of intelligence which states “it is not ‘fixed’, but rather modifiable”. Feuerstein is recognized for his work in developing the theories and applied systems of structural cognitive modifiability, mediated learning experience, cognitive map, deficient cognitive functions, learning propensity assessment device, instrumental enrichment programs, and shaping modifying environments. These interlocked practices provide educators with the skills and tools to systematically develop students’ cognitive functions and operations to build meta-cognition.

Feuerstein was the founder and director of the International Center for the Enhancement of Learning Potential (ICELP) in Jerusalem, Israel. For more than 50 years, Feuerstein's theories and applied systems have been implemented in both clinical and classroom settings internationally, with more than 80 countries applying his work. Feuerstein's theory on the malleability of intelligence has led to more than 2,000 scientific research studies and countless case studies with various learning populations (See bibliography and publication on Feuerstein's work).