He teaches Algebra 1 and Geometry. He grew up in Los Altos, California's Silicon Valley. Off to San Diego State he went (and Sonoma State too) where he received his bachelor's degree in physics. Mr. Grossberg loves traveling and learning about cultures, and a high point for him was when he took his family to live in Costa Rica for two years. He enjoys soccer and helps run a soccer academy for kids. Mr. G. has 2 kids, 2 cats and numerous video games. Ask him about his feats in "Plants & Zombies" and "Balloons."