Personalized and group sessions for UA courses like CHEM 151 and 152, with live lectures and practice problems.
Expert tutoring to help students master complex concepts and improve exam performance in organic chemistry.
Guidance on MCAT preparation, medical school applications, and academic planning for pre-med students.
One-on-one instruction tailored to individual learning needs and flexible scheduling.
Interactive group sessions and recorded videos to reinforce STEM concepts and foster collaborative learning.
Targeted support with practice problems and study techniques to boost grades and reduce stress for exams.

Empowering students to excel in STEM with expert tutoring and personalized support for academic success.
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STEM Excellence Tutoring in Tucson provides top-tier tutoring services for students, particularly those in pre-med and science tracks at the University of Arizona. Specializing in general chemistry, organic chemistry, and other STEM subjects, we offer live lectures, recorded concept videos, and flexible private or group sessions. Our dedicated tutors, led by Lori, focus on building confidence, improving grades, and offering guidance for MCAT preparation and medical school applications. With a 5-star rating, we are committed to helping students thrive in their academic journeys.
This program has helped me tremendously with my science classes, especially general chemistry and organic chemistry. Before I started this program as a freshman I was struggling understanding the material in general chemistry 1, but after signing up with Stem Cell Excellence they helped me comprehend everything better and I raised my grade. They have also been very helpful with giving useful advice on my route to medical school. I highly recommend this program for anyone struggling or wanting to get A's in science classes, and anyone on the pre-med track.
I just finished up my freshman year at UA and worked with STEM Excellence over the pass year to help me with general chemistry (151 and 152). I can not be more grateful to have reached out to them for help when I was struggling. Lori is an amazing tutor and she truly cares the most for her students. She wants you to succeed and gives you the resources to do so with live lectures twice a week and recorded concept videos. Without STEM, I would not become the person I am today and would not have been able to flourish in chemistry. If you are planning to take gen chem or other science courses and need some extra help, I cannot recommend STEM enough.
I HIGHLY recommend STEM Excellence Tutoring. They have been and continue to be SPECTACULAR. They have been able to reduce mine and my daughter stress level by providing the best strategies needed to excel in all her STEM classes including flexible hours as well as extra needed sessions to help with all her exams. My daughter is a Pre-Med student and has been supported by Lori and team since her freshman year to assist with all that is needed to prepare for MCAT and medical school application process. Lori has been a pleasure to work with when trying to develop a plan to succeed in every aspect of my daughter journey. I don't know where my daughter would be with them. THANK YOU!
Stem Excellence has helped me go from getting a 64% on a Chemistry exam ,to consistent 90+ exam grades. Lori is extremely helpful, and always cares so much for her students, and I would absolutely recommend joining her team!
Lori has been amazing to work with. I was struggling with my chem 151 class at UA and she was able to establish where things were going wrong and help me feel more confident in my chemistry abilities. I have utilized both her group tutoring sessions and private tutoring sessions, and both have been extremely helpful. She gives a full overview of concepts in ways that are easy to understand, as well as practice problems that prepare you for exams. I would recommend Lori and STEM Excellence to anyone.
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