
Ms. Brizeyda Argueta, 3rd Grade Teacher
Email: [email protected]
Ms. Brizeyda Argueta is a third-grade teacher at Randolph Elementary. She was born in San Miguel, El Salvador. Before Randolph, Ms. Argueta was the Assistant Supervisor in Extended Day at Glebe Elementary. She attended George Mason University, where she received her bachelor’s degree in Elementary Education (PK-6) and a minor degree in Childhood Studies. She is currently pursuing her master’s degree in Education with an emphasis in Curriculum and Instruction. She loves spending time with family and friends. She is looking forward to a great school year!

Brianna Carey, 3rdGradeTeacher
Email:[email protected]
Brianna Carey is a dedicated 3rd grade teacher at Randolph Elementary with 9 years of experience fostering student growth and enthusiasm for learning. She creates an engaging and inclusive classroom environment where every student can thrive.Brianna holds a Bachelor’s Degree in Psychology and Elementary General & Special Education as well as a Master’s Degree in Educational Psychology from Marist University and is committed to ongoing professional development to bring the best practices into the classroom. Outside of teaching, she loves drawing, hiking, and spending time with her beagle, Henry.Brianna looks forward to a fantastic year of learning, growth, and collaboration with students, families, and colleagues.

Leo Ribeiro, 3rd Grade Teacher
Email: [email protected]
Leo is excited to return to Randolph Elementary School as a special education teacher. Born and raised in Brazil, he moved to Arlington in 2007 and has proudly called it home ever since. With experience in both general and special education across public and private schools in Maryland and Northern Virginia, he is dedicated to supporting the whole child through inclusive, student-centered classrooms where every child can thrive, and he values strong collaboration with families and colleagues to ensure student success. Leo holds a Master’s degree in Education with a focus on Curriculum and Instruction. Outside of school, he enjoys cooking, hiking, traveling, and spending time with family, friends, and his two cats.

Ms. Kerri Martin, Reading Specialist
Email: [email protected]
Kerri Martin is a Reading Specialist at Randolph Elementary. Prior to working at Randolph, she ran Book Buddies for multiple APS elementary schools. Kerri has a Masters of Education from UVA and completed her undergraduate work at the University of Dayton. In her free time, she likes to spend time with her family, get outside, and of course, READ!
Ms. Christine Chapuis, Math CoachEmail: [email protected]Christine Chapuis has been the Mathematics Coach at Randolph since the fall of 2021. Prior to working at Randolph, Christine worked in the Mathematics Office at Syphax and also served as the math coach at Drew. She also taught fifth grade in Boston at the start of her career. She attended Boston College for undergrad (go Eagles!) and Simmons University for her Masters degree. In her free time, she enjoys spending time with her three children, Rachel, Ben, and Nicholas. Both Rachel and Ben attend Wakefield and Nicholas is a Kindergartener at Campbell. Her husband also works at an APS school (Oakridge). She also loves spending time with her two dogs, Ginger and Rooney, and her friends and neighbors. And of course, she is a MATH person (and so are you!).

Ms. Natani McGinnis, Math Coach
Email: [email protected]
Tani McGinnis has been a math coach for seven years and is in her second year as a math coach at Randolph Elementary. Before that, she taught fourth grade for seven years in both Arlington and St. Louis. Tani has a Masters of Teaching and a Masters of Education Leadership from George Mason University. She loves teaching and coaching and feels lucky to be part of the Randolph Stars! In her free time, she enjoys cooking, hiking, being outside, and spending time with her kids and husband.

Karina Fasullo, EL Teacher
Email: [email protected]
Karina Fasullo is a National Board Certified educator with 20 years of experience fostering student growth and enthusiasm for learning. Passionate about supporting multilingual learners through culturally responsive teaching and evidence-based literacy practices, she creates an engaging and inclusive classroom environment where every student can thrive.Karina holds a Master’s degree in Education from the University of Virginia and is committed to ongoing professional development to bring best practices—especially in language development and literacy instruction—into the classroom. Outside of teaching, she enjoys spending quality time with her husband and two young children, running, and traveling.Karina looks forward to a fantastic year of learning, growth, and collaboration with students, families, and colleagues.
Third grade students learn about Ecosystems and Simple Machines in science. The students will visit the outdoor lab for the first time, to enhance their learning about simple machines. In social studies, they learn about 5 important Ancient Civilizations: Egypt, China, Rome, Greece, and Mali. It is a big year for mathematical learning! Students learn everything from place value for numbers up to 6 digits, to multiplication, to geometry. In Reading, students make a shift from learning to read, to reading to learn- with a big focus on comprehension skills in both fiction and non-fiction. Near the end of the year, students take SOL’s for the first time in reading and math. The third grade team works collaboratively with the math coach and reading team to ensure student growth and learning. Students in third grade also learn a variety of new concepts in the arts and physical education including playing the recorder and taking swimming lessons.Through the six transdisciplinary themes Third grade students learn about the concepts of cycles and systems studying simple machines, ecosystems and water. Students will visit the outdoor lab for the first time. This exploration will also look at ancient world civilizations and ask students to make connections to the present day.It is a big year for mathematical learning! Students learn everything from place value for numbers up to 6 digits, to multiplication and division, to geometry. They create and solve practical problems using all four operations. Students in grade 3 explore fractions concepts more deeply and begin to add and subtract fractions with like denominators. They also explore numerical and geometric patterns and explore the concept of equality in depth.In Reading, students make a shift from learning to read, to reading to learn- with a big focus on comprehension skills in both fiction and non-fiction. Near the end of the year, students take SOL’s for the first time in reading and math. The third grade team works collaboratively with the math coach and reading team to ensure student growth and learning. Students in third grade also learn a variety of new concepts in the arts and physical education including playing the recorder and taking swimming lessons.