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James Watson and Francis Crick - DNA

James Watson and Francis Crick - DNA

Rosalind Franklin - DNA

Rosalind Franklin - DNA

Antoni van Leeuwenhoek - Microscopes

Antoni van Leeuwenhoek - Microscopes
Emily Tombleson

About Mrs. Tombleson (formerly Ms. Blake)

Hello!  My name is Emily Tombleson (aka "Mrs. T") and I am privileged to be teaching the biological sciences at Pioneer.

This is my seventh year teaching at Pioneer High School (I began in the 2007-2008 academic year), though I first got my feet wet in teaching as a long-term substitute for half a year at Monterey Trail High School in Elk Grove in 2006-2007.  I cannot think of a more rewarding profession!

I earned my Bachelor of Science degree in 2004 at the University of California at Davis, where I majored in Animal Biology.  It wasn't until my fourth and final year at UC Davis that I discovered I love to teach.  While at UCD, I involved myself in many opportunities that allowed me to work in various animal conservation and animal welfare internships.  While I greatly enjoyed those experiences, I also took the opportunity to volunteer in science classes at a couple of local high schools and truly fell in love with the teaching profession.  After UCD, I attended Sacramento State and earned my teaching credentials in both Biological Sciences and Health Sciences.  High school students truly are treasures; some may already glitter and shine while others may be diamonds in the rough.  With the right learning environment and partnership among the school, families, and the community, I believe any student can find success in education.

Please join me in making this year as meaningful as possible.  You can contact me through School Loop Mail or directly to my email at


-Mrs. Tombleson

I Teach Because...

I teach because each and every student has the capacity to know and love science.  I want my students to come away with a thirst to question and find explanations for why things are the way they are.

I teach because it is unpredictable, challenging, and incomparably rewarding; the “Aha!” moments are unrivaled in making my day.
I teach because every single student is worth it, even if they don’t yet see it.  I’ve seen students with extreme hurdles inlife find success, for there are always choices. 
I teach because my students teach me.
I teach because there is always a choice.  Knowledge is key to making good decisions and I want my students to think for themselves and realize that the majority is not always right.
I teach because each generation charts a new course for the global society and by learning from the collective knowledge of the previous generation, they can avoid the errors of the past and look towards building a brighter future.
I teach so that someday I won’t have to; each student can walk away with a passion to learn on their own.


--I would like to recognize Nicholas Lai and Andrew Nguyen for their words that I couldn't have said better myself with my shared sentiments.

Assignments calendar for my classes



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Mrs. Tombleson backpacking in the Lost Coast

Backpacking in the Lost Coast

Charles Darwin - Natural Selection

Charles Darwin - Natural Selection

Gregor Mendel - Genetics

Gregor Mendel - Genetics