Online chemistry tutoring, classes and exam preparation for high schoolers given by Dr. Cristina Gherasim

What are people saying about their Tutor?

Check their stories and see why you should choose me as your child's chemistry tutor

"When I started (the chemistry class), my grades were bad. I was failing, I think I had like a 59, and I was very upset and I didn't have a lot of confidence in myself. So then after we started working, my grades started going up and I got more confident in the classroom and I started answering questions, and yeah, just kind of gaining more confidence in myself. So, yeah. And now I just took my final and I got a 92 on it." 

(Lorena Briceno, 10th-grade student from New York, US)

" At the beginning of the school year chemistry was kind of scary for me. When I started I was getting like 60s and 65s on my tests. I couldn't figure out a way to like pull my grades up. I wasn't proud of it because science was one of my higher grades until this year when it was just terrible. So I knew I had to do something.

So since starting tutoring, my grades have progressively gone up. I went from like 60s to now getting 80s and 85s on my tests. And sometimes 90s. I'm actually proud of myself now, like even besides getting good grades, I'm actually understanding and I'm able to answer questions in class.

I feel very confident, like doing my homework and just knowing that I can understand the concepts and just get through it pretty quickly helps me in class too. I'm very confident. I like answering questions and I like being engaged in class. So tutoring has helped me a lot."

(AJ Quinn, 10th-grade student from New York, US)

In the beginning of this year, I was doing horribly bad. I wasn't doing good. I was failing. I was at 44. But now my averages are 90 and I could still do better, but I'm doing great."

Eric Lopez (10th-grade student from New York, US)

"He usually didn't struggle with math or science, but with chemistry, he had a struggle so his grade average was dropping. He usually is able to maintain 90s in science, and he had now dropped down into the 70s. 

And then we started with you. And when we started, you started to break down the chemistry with him. From the beginning, and he quickly picked up and his grades went right back up until the 90s. After just a few tests.

For other parents who had their children in this situation, I did refer them to you. You know, I recommended that they take your tutoring. Because a lot of help is good, it's a good thing. And we thank you! It's a pleasure to work with you as well. We very much appreciate all that you do. So thank you!"

Tanya Quinn (Mother of AJ, 10th-grade student, New York, US)

"Eric has always been a good student..So I was feeling frustrated because he was struggling with just one subject, which is chemistry. He was struggling. That was his only low grade, I think, 50 %. He was failing, definitely failing, failing the class. And that does impact his entire cumulative GPA.

Eric has been now with you tutoring in chemistry for a couple of months. And so far we've seen amazing results! He started getting 80s  and now he's getting 90s in his exams and his tests, and he understands the concepts. That is making me very happy because he is starting to grasp what chemistry is and all the different concepts which are complex. Thank you, Cristina! Thank you!"

Lorena Giler Lopez (mother of Eric, 10th-grade student, New York, US)

"You know your subject inside and out. So my son just slipped into your program and he's been going now for the whole school year. So our plan is to continue and to prepare him for the college AP chemistry exam so that he can get college credit for it. So a lot of the learning has been the study skills. That's usually the struggling area for students, taking notes, reading the material, reading the text so that you can understand. 

So I think that it hasn't just been chemistry. It's been study skills that you have taught him to organize himself and you hold him accountable for it. And it's nice to just be a mom. You know, there's a lot of things to fight about. And I picked not to fight about chemistry. So I'm relieved!"

Esmy Lozano (Homeschool Mom, Dallas, Texas, US)

"She was struggling greatly.... And from 65-67% that she got the first semester in school, barely passing at this point...now, last week, she received her grades and are like 88-89 % in chemistry, and she's able to understand it! She was screaming out of her room: Mom, I've got 88!!! So she was excited. She was so happy!"

Sulma Alvarado (Mother of Miranda, 10th-grade student, New York, US)

"Cristina wants you to know that you've got an 89.5 at your assignment!!!"

Mathew Lozano, homeschool student, Texas US

"As a homeschool parent, I have a bachelor of science chemistry in college and high school, but I am very rusty and I didn't feel prepared to provide the instruction for chemistry. And that's why I sought you out. I said: I'm going to outsource this topic because I want my child to really be taught systematically. And you definitely have done that!

I do want to say that accountability is big with Christina. She stays on top of it and she communicates how the sessions were and where the struggles are. And, you know, from teaching note-taking skills to study skills, to doing spreadsheets for my son so that he can keep up and track his work has made such a difference. And I feel like the study skills that you have taught him are transferring into his other subjects.

So he gets a lot from your sessions. And I just want to say thank you publicly! I appreciate you so much and I'm so glad I found you! And I know all chemistry tutors are not created equal and you are the best-kept secret in the Netherlands. And we hope that more people will hear about you here across the pond."

Interview about Homeschool Chemistry with Esmy Lozano (homeschool mom from Dallas, US)

"Got an 89.5 at the chemistry assignment!"

Matthew Lozano, homeschool student, Dallas, Texas, US

"When I started (the chemistry class), my grades were bad. I was failing, I think I had like a 59, and I was very upset and I didn't have a lot of confidence in myself. So then after we started working, my grades started going up and I got more confident in the classroom and I started answering questions, and yeah, just kind of gaining more confidence in myself. So, yeah. And now I just took my final and I got a 92 on it." 

(Lorena Briceno, 10th-grade student from New York, US)

" At the beginning of the school year chemistry was kind of scary for me. When I started I was getting like 60s and 65s on my tests. I couldn't figure out a way to like pull my grades up. I wasn't proud of it because science was one of my higher grades until this year when it was just terrible. So I knew I had to do something.

So since starting tutoring, my grades have progressively gone up. I went from like 60s to now getting 80s and 85s on my tests. And sometimes 90s. I'm actually proud of myself now, like even besides getting good grades, I'm actually understanding and I'm able to answer questions in class.

I feel very confident, like doing my homework and just knowing that I can understand the concepts and just get through it pretty quickly helps me in class too. I'm very confident. I like answering questions and I like being engaged in class. So tutoring has helped me a lot."

(AJ Quinn, 10th-grade student from New York, US)

In the beginning of this year, I was doing horribly bad. I wasn't doing good. I was failing. I was at 44. But now my averages are 90 and I could still do better, but I'm doing great."

Eric Lopez (10th-grade student from New York, US)

"He usually didn't struggle with math or science, but with chemistry, he had a struggle so his grade average was dropping. He usually is able to maintain 90s in science, and he had now dropped down into the 70s. 

And then we started with you. And when we started, you started to break down the chemistry with him. From the beginning, and he quickly picked up and his grades went right back up until the 90s. After just a few tests.

For other parents who had their children in this situation, I did refer them to you. You know, I recommended that they take your tutoring. Because a lot of help is good, it's a good thing. And we thank you! It's a pleasure to work with you as well. We very much appreciate all that you do. So thank you!"

Tanya Quinn (Mother of AJ, 10th-grade student, New York, US)

"Eric has always been a good student..So I was feeling frustrated because he was struggling with just one subject, which is chemistry. He was struggling. That was his only low grade, I think, 50 %. He was failing, definitely failing, failing the class. And that does impact his entire cumulative GPA.

Eric has been now with you tutoring in chemistry for a couple of months. And so far we've seen amazing results! He started getting 80s  and now he's getting 90s in his exams and his tests, and he understands the concepts. That is making me very happy because he is starting to grasp what chemistry is and all the different concepts which are complex. Thank you, Cristina! Thank you!"

Lorena Giler Lopez (mother of Eric, 10th-grade student, New York, US)

"You know your subject inside and out. So my son just slipped into your program and he's been going now for the whole school year. So our plan is to continue and to prepare him for the college AP chemistry exam so that he can get college credit for it. So a lot of the learning has been the study skills. That's usually the struggling area for students, taking notes, reading the material, reading the text so that you can understand. 

So I think that it hasn't just been chemistry. It's been study skills that you have taught him to organize himself and you hold him accountable for it. And it's nice to just be a mom. You know, there's a lot of things to fight about. And I picked not to fight about chemistry. So I'm relieved!"

Esmy Lozano (Homeschool Mom, Dallas, Texas, US)

"She was struggling greatly.... And from 65-67% that she got the first semester in school, barely passing at this point...now, last week, she received her grades and are like 88-89 % in chemistry, and she's able to understand it! She was screaming out of her room: Mom, I've got 88!!! So she was excited. She was so happy!"

Sulma Alvarado (Mother of Miranda, 10th-grade student, New York, US)

"Cristina wants you to know that you've got an 89.5 at your assignment!!!"

Mathew Lozano, homeschool student, Texas US

"As a homeschool parent, I have a bachelor of science chemistry in college and high school, but I am very rusty and I didn't feel prepared to provide the instruction for chemistry. And that's why I sought you out. I said: I'm going to outsource this topic because I want my child to really be taught systematically. And you definitely have done that!

I do want to say that accountability is big with Christina. She stays on top of it and she communicates how the sessions were and where the struggles are. And, you know, from teaching note-taking skills to study skills, to doing spreadsheets for my son so that he can keep up and track his work has made such a difference. And I feel like the study skills that you have taught him are transferring into his other subjects.

So he gets a lot from your sessions. And I just want to say thank you publicly! I appreciate you so much and I'm so glad I found you! And I know all chemistry tutors are not created equal and you are the best-kept secret in the Netherlands. And we hope that more people will hear about you here across the pond."

Interview about Homeschool Chemistry with Esmy Lozano (homeschool mom from Dallas, US)

"Got an 89.5 at the chemistry assignment!"

Matthew Lozano, homeschool student, Dallas, Texas, US