As you may already know, Georgia Tech requires a letter of recommendation from a teacher. I plan to major in chemical engineering or biomedical engineering and need some advice on which letter of rec to submit.
I am stuck between two letters: one from my chemistry teacher (had for 3 years) and one from my club advisor (I am President and founder - 2 years). I am almost sure that my advisor will write me a better recommendation. However, on the Common App, the application says the letter must be from a teacher. I haven’t actually been in one of my advisor’s classes so she technically doesn’t qualify as my teacher, at least in terms of school courses.
Would it be better to submit a letter from her or should I send the one from my chemistry teacher? I know that my chemistry one will be better than mediocre but I believe that I just don’t have as well of a relationship with my chemistry teacher as I do with my advisor.
BTW, I’m applying EA so if someone can answer quickly, it’d be greatly appreciated. Thank you so much!
Letters of rec need to be from an academic teacher of a core subject. If Georgia Tech allows an optional second rec, then you can submit the club advisor’s letter 
You need to follow the rules. Send the teacher one. The odds of your recommendation making the difference are slim. You had this teacher for 3 years. I have to believe he/she can write a decent recommendation.
Perhaps you can get the Chem teacher or your counselor to include some of the content you think the club teacher would have covered. Your counselor can write a letter of recommendation.“You should ask your counselor to submit the Common Application School Report or a similar form. An actual counselor recommendation letter is not required for admission but will be reviewed, if submitted.” Our counselor asks what information a student feels like isn’t covered otherwise in their app so they can cover that topic in more detail. They also ask other teachers who did not write the recommendation for anecdotes they could use in their letter. So if your counselor is helpful they can be a backdoor way to be sure you are represented as well as you can be. My son used a science teacher for his rec because he felt like he would be able to talk about how he worked in groups, researched independently, lab skills, etc even though he had a math teacher who was willing to say he was one of her top 5 students in 20 years of teaching. Got a great rec from the science teacher and the counselor is getting across the math talent from the teacher. Not much the math teacher could comment on in great detail except his talent and his tutoring others which is already well represented in his app.