The Investigations Staff

Karen Economopoulos
Bio

Karen is a co-director of the Investigations Center for Curriculum and Professional Development. Her work on Investigations spans all three editions; she oversaw the development of K-2 for the 1st edition, and co-directed the development of the 2nd and 3rd editions. Karen works extensively with classroom teachers, administrators, and school districts in the area of curriculum reform. She is a former K-2 teacher with a special interest in supporting the range of learners in elementary classrooms. More »

Keith Cochran
Bio

Keith is a co-director of the Investigations Center for Curriculum and Professional Development. He co-directed the development of Investigations 3, was a senior author of the 2nd edition, and has extensive experience providing professional development for teachers, schools, and districts implementing Investigations. Keith taught in a range of settings, including Native American Nations (AZ) and the Clark County School District (Las Vegas, NV), where he taught grade 5 and became a Math coach. More »

Myriam Steinback
Myriam Steinback
Bio

Since coming to TERC in 1996, Myriam’s work has focused on mathematics teaching and learning at the elementary level (i.e. Investigations in Number, Data, and Space), and in adult education settings (i.e. EMPower). She has also worked to design face-to-face and online professional development focused on mathematics. A native-Spanish speaker, Myriam came to TERC with 20 years of teaching mathematics to students and teachers. More »

Susan Jo Russell
Bio

Susan Jo began her career in education as an elementary classroom teacher and math coach. She co-directed the original development and second edition of Investigations in Number, Data and Space. Her research has focused on children’s mathematical understanding and on how teachers can learn more about mathematics and about children’s mathematical thinking. Current work centers on early algebra, number and operations, mathematical argument, and how teachers can support students to engage in mathematical practices. More »

Megan Murray
Bio

Megan has been involved in the development and writing of all three editions of Investigations in Number, Data, and Space. Originally a classroom observer who spent many hours in field test classrooms, she is now a senior author, specializing in grades K-2. She has also developed and facilitated professional development around Investigations in particular and elementary mathematics in general. More »

Arusha Hollister
Bio

Arusha is one of the authors of both the 2nd and 3rd editions of Investigations in Number, Data and Space. She has also developed both in-person and online professional development for Investigations. Before working at TERC, Arusha was an elementary school classroom teacher and a math coach. More »

Deborah Schifter
Bio

Deborah has worked as an applied mathematician; has taught elementary, secondary, and college level mathematics; and since 1985, has been a mathematics teacher educator and educational researcher. With Virginia Bastable and Susan Jo Russell, she produced the professional development series, Developing Mathematical Ideas, and two books about students’ early algebraic reasoning: Connecting Arithmetic to Algebra and But Why Does it Work? Deborah was a writer on the second and third editions of Investigations in Number, Data, and Space. More »

Cynthia Garland-Dore
Bio

Cynthia has been an Investigations workshop leader for more than 20 years. She’s led face-to-face workshops, facilitated online courses, and provided ongoing support to teachers and school leaders as they implement Investigations. She was part of the team that developed our online courses—Implementing Investigations 3, Developing Computational Fluency, Making Sense of Fractions, and Supporting Math Learning.

Lorraine Brooks
Bio

A long-term member of the Investigations Center for Curriculum and Professional Development, Lorraine’s work focuses on Internet technologies and the development and management of the Investigations website. Her prior work focused on collecting and managing data about usage of the curriculum, and on production, dissemination, and management of materials and information. More »

Denise Treacy
Bio

Since joining TERC in 2014, Denise has worked on the development of Investigations 3. Previously a special education teacher, she has experience using Investigations to teach mathematics in inclusive and self-contained settings at grades K-2.

Annie Sussman
Bio

Since joining TERC in 2015, Annie has worked on the development and writing of the 3rd edition of Investigations in Number, Data and Space. A former elementary school teacher, Annie has experience using the Investigations curriculum in grades 1-4. Her current projects include designing professional development to support mathematics teaching and learning through use of the Investigations curriculum, and work on two research studies that examine ways to effectively support student engagement in the Standards for Mathematical Practice.

Chris Clancy
Bio

Chris joined TERC in 2015, to provide administrative support to the Investigations 3 and Investigations PD projects. He was actively involved in the development of the Investigations 3 website, and continues to support and manage it.