| Local Theoretical Models and Mathematical Sign Systems |
| A framework for experimental observations in educational mathematics |
| Concrete Models and Abstractions Processes |
| Teaching to operate the unknown |
| Solving Problems with a "Just Acquired" Algebraic Syntax |
| Cognitive Tendencies and Abstraction Processes in the Learning of Algebra (and Geometry) |
| Mathematical Sign Systems: A theory for interpreting experimental observations |
| Solving Arithmetic/ Algebraic Problems |
| A Theoretical and Empirical Approach |
| Filloy, Eugenio, Rojano, Teresa, Puig, Luis |
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