Welcome. I’m Mr. Stephen Callahan. I am a coordinator at the San Joaquin County Office of Education. I am also the manager of the Engineering and Design Center. This is a collection of lessons and resources both from when I taught Engineering, Physics, Chemistry and Mathematics, and for those students both on field trips to the EDC and at Teachers College of San Joaquin. If you find something useful, feel free to use it here at my website. Please don’t take it elsewhere. I’m fond of the things I write. Thank you.

There is a good chance you are interested in finding the moodle site. It is here.
There are also a lot of digital resources.  Many of them are at the posts page.