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Welcome, Chatsworth High School Students!

This is Mr. Vallejo's web page for science classes at Chatsworth High School in the Los Angeles Unified High School District.  Chatsworth is located in the northeast corner of the San Fernando Valley in sunny southern California.  Downtown Los Angeles is located just 30 miles to the southeast.

Ben Vallejo is an adjunct professor of biology at Moorpark College, as well as one of the forty-nine (1/02) National Board Certified Teachers in secondary science (AYA/Science) in the state of California.  The total number of NBCTs in the state in all areas is 1960, as of September 2003.  Nationwide, there are just under 24,000 NBC Teachers.  Mr. Vallejo’s area of expertise is in the area of performance-based assessment of the California state science content standards, as he has worked as a consultant for the California Department of Education on the statewide Golden State Examination.  In addition to his current assignments, Mr. Vallejo has spent his seventeen years as an educator at Reseda High School and the North Hollywood High School Animal Studies/Biological Science Zoo Magnet Center at the Los Angeles Zoo.   Mr. Vallejo is also a mentor/master teacher for the Los Angeles Unified School District and the California State University, Northridge (CSUN) Single Subject University Intern Program.  He is on the faculty at Chatsworth Senior High School, where he has taught a myriad of classes, including Advanced Placement Environmental Science, biology (honors, college-preparatory, and sheltered), marine biology, integrated science, and advanced physical science.


To begin your journey through The Biology Portal, click on your class:

Advanced Placement Environmental Science

Honors Biology

Marine Biology

Biology AB

Advanced Physical Science

Integrated Science


This Week’s Class Activities and Homework

To view student work, please click here!


Other useful resources:

California state science content standards

The Online Biology Textbook

Chatsworth High School Home Page

Library Resources, including SIRS,, and the LA Times newsbank

UCLA Athletics—Go Bruins, Beat the Trojans!!!

Chatsworth High School Filpino Club Home Page


Back to Home Page OR email Mr. Vallejo