Contact Info:


 Biology/Honors Biology tutoring hours:

3-4 PM Tuesday and Thursday in Mr. Callahan's room or on Google Meet link by appointment

Google Classroom Code for 1B Biology : hunh3tr

Google Classroom Code for 2A Honors Biology: 7dxnauw

Google Classroom Code for 3A Biology: 3u7vgxt

Google Classroom Code for 3B Honors Biology: ogwg3pf

Google Classroom Code for 4A Biology: aixyt3k

Google Classroom Code for 4B Biology: red7mek

Biology Remind 101(1B, 3A, 4A, and 4B): text @schsbiolo to 81010

Honors Biology Remind 101( 2A and 3B):  text @schshon to 81010


Callahan's tutoring- Mondays, Tuesdays, and Thursdays after school, 3-4 PM

I will respond to any student/parent emails as quickly as possible but within 24 hours. Grades are being updated regularly- please keep up with this on IC.

Updated grade alerts/newletters will go out at the beginning, middle and end of each content unit. 

 "Stream" is what we are doing IN CLASS- videos, activities, vocab activities, lectures. "Classwork" is graded assignments, due dates, resources organized by content units. All "missing' work is due on Unit test day, per the SCHS deadline policy. After deadline/test day all unexcused "missing" work will become a zero and IF standards match will be replaced by unit test grade. 

Test retakes- per Science dept policy, ONLY students with a failing test grade ( below 70) will earn the option to retake with required tutoring and a retake will equal up to a maximum of a 70% in the grade book. 


Hello! My name is Brad Callahan, and I teach Biology, Honors Biology and AP Biology here at SCHS! I have been teaching for 22 years in public education in elementary, middle, and high school science, including AP Biology. I have my B.S. in Education from Auburn University and my M.S. in Educational Leadership from Mercer University. I am currently pursuing my Ed.D. in Curriculum and Instruction from Liberty University.  I have been married for 18 years to my beautiful and  amazing wife Katie, and have 13 year old fraternal twins, Aidan and Addison, who fill my time with swimming, softball, band and chorus to name a few things:).  I enjoy running, yoga, cycling, working out, swimming, spending time at the beach, and supporting my favorite teams, the Auburn Tigers, Carolina Panthers and Atlanta Braves- War Eagle!

I also help coach the Social Circle HS and MS Swim team, so please come by and see me or email me with any swimming questions. 



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