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Math
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Jessica Aragon
Math/PE Teacher
jaragon@ggusd.us
Hector Aviles
Math Teacher
haviles@ggusd.us
714-663-6424
David Cho
Math Teacher
dcho1@ggusd.us
714-663-6424
Sunny Costello
Math Teacher
hcostello@ggusd.us
Lilly Dang
Math Teacher
ldang@ggusd.us
Evie Guntalilib
Math Teacher
eguntalilib@ggusd.us
714-663-6424
Noah Ho
Math Teacher
nho@ggusd.us
(714) 633-6424
Bridget Holderman
Teacher
bholdermann@ggusd.us
Ya Na Kim
Mathematics/Computer Science Teacher, Technology Coordinator
ykim@ggusd.us
Robert Nguyen
Math Teacher, UNICEF and Project Vietnam Club Advisor, Head Varsity Girls Basketball Coach
tnguyen18@ggusd.us
Kevin Seo
Math Teacher, Red Cross Advisor
kseo@ggusd.us
Ryan Tonthat
PLTW Engineer, CTE Dept Chair, Math Teacher, STEM Club Adviser
714-663-6424
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