# Leadership

**Founding Leadership**

**Dr. Agnes Tuska **

### Professor, Credential Advisor, Mathematics Educator

#### Department of Mathematics, California State University, Fresno

#### agnes.tuska@geogebraca.org

## Degrees

**B.S., Mathematics and Physics**

Eotvos Lorand University of Science, Budapest, Hungary

**Single Subject Teaching Credential in Mathematics and Physics**

Eotvos Lorand University of Science, Budapest, Hungary

**M.S., Mathematics**, Ohio State University

** Ph.D., Mathematics Education**, Ohio State University

## Areas of Expertise and Interest

**Teacher Education****History of Mathematics****Problem Solving****International Comparison Studies in Mathematics Education**

**Dr. Rajee Amarasinghe**

### Professor, Credential Advisor, Mathematics Educator

#### Department of Mathematics, California State University, Fresno

#### rajee.amarasinghe@geogebraca.org

## Degrees

**B.S., Mathematics**, Colombo University, Sri Lanka

**M.S.**,** Mathematics**, Purdue University

**M.S., Computer Science**, Purdue University

**Ph.D., Mathematics Education**, Indiana University

## Areas of Expertise and Interest

**Using technology in mathematics teaching and learning****Student attitudes and beliefs about mathematics****Interdisciplinary mathematics teaching and learning**

**Mr. Bill Lombard **

### Resource Manager

### GeoGebra Institute of California Trainer

#### bill.lombard@geogebraca.org

## Degrees

**B.A., Mathematics, **San Jose State University

**Single Subject Teaching Credential, Mathematics, **San Jose State University

**M.S.T., Mathematics, University of New Hampshire**

## Areas of Expertise and Interest

**Teacher Education, Mathematics Workshops****Mathematics and Technology****Problem and Puzzle Solving****Mathematics curriculum for elementary and high school**

**Dr. Armando M. Martinez-Cruz**

### Professor, Mathematics Educator

#### Department of Mathematics, California State University, Fullerton

#### armando.m.martinez.cruz@geogebraca.org

## Degrees

**B.S., National Autonomous University of Mexico **

**M.A., The Ohio State University **

**Ph.D., The Ohio State University**

## Areas of Expertise and Interest

Dr. Martinez-Cruz is a mathematics educator specializing in technology use. His research interests include problem solving, problem posing, and learning mathematical concepts in technology environments. He is actively involved in several teacher education programs.

**Dr. Oscar Vega**

### Associate Professor, Mathematician

#### Department of Mathematics, California State University, Fresno

#### oscar.vega@geogebraca.org

## Degrees

**Licenciatura en Matematicas**, Universidad de Chile, Chile

**Ph.D.**, Mathematics, University of Iowa

## Areas of Expertise and Interest

**Translation Planes**

**Finite Geometries**

**Combinatorics**

**Mr. Andrew Hammons**

### Educator

#### Joshua Circle Elementary, Hesperia Unified School District

### Educational Technology Consultant

#### andrew.hammons@geogebraca.org

## Degrees

**B.A. in Sociology**, California State University, Fullerton

**Multiple Subject Teaching Credential**, University of Redlands

## Areas of Expertise and Interest

**Blended and remote learning K-12**

**Learning Management Systems**

**Big Blue Button educational conferencing for remote learning****MOODLE (Modular-Object-Oriented-Dynamic-Learning-Environment)**