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Online classes in our virtual classroom
Flexible classes adapted to your day-to-day life
We promise, if you are not satisfied we will refund your money.


He's from Colombia

10 10 5


¿Problems learning chemistry? Don't worry, I can help you in an easy-going way

Hello, having problems to understand the classes in your school or university? I am here to be with you during your learning process and help you to understand and to obtain the grades you are looking for. I am very patient and I care about you first as a student. I wish I could see you smile and enjoy this whole process. 100% dynamic classes and with many innovative elements to help you, I will support you until you achieve your goal, I have a lot of experience and I know the different types of students that are in the classrooms. I have over ten years of experience teaching at universities and colleges so I can help you.


over 5 years of experience teaching online classes

  • Chemistry
    Pure chemistry University
    Chemistry University
    Organic Chemistry University
    Basic Chemistry University
    Applied chemistry University
    Analytical chemistry University
    ¿Problems learning chemistry? Don't worry, I can help you in an easy-going way



FrenchFull proficiency

EnglishFull proficiency


Ph.D. Phd

Book an online lesson (The calendar displayed shows your local time)

Alejandro accepts bookings with at least 12 hours in advance.

hours Monday

Can't find the availability that suits your needs?

About me (pictures, hobbies, extracurricular interests...)

bicicleta biking velo


adriana gonzalez alcivar
2 reviews
Es el mejor profesor de química! Se le entiende a la perfección y tiene basto conocimiento en el tema. La mejor inversión si tienes dudas de la materia.
La experiencia que tengo de él es que es muy atento y previsor, prepara y explica muy bien el temario que quiere dar. Aparte, y me parece muy importante, te proporciona mucho material para que practiques y afiances los contenidos que ves con él por tu cuenta. Estoy muy contenta de dar clase con él.
Dayana Valentina Vargas Bañol
2 reviews
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Frequently Asked Questions

• Can I cancel a booking?

Yes, you can cancel booking up to 8 hours before the lesson starts, indicating the reason for the cancellation. We will study each case personally to carry out the refund.

• How do I pay for the lesson?

At the time you select a lesson or package of hours, you will make the payment through our virtual payment service. You have two options:
- Debit / Credit
- Paypal
Once the payment is settled, we'll send you an e-mail with the booking confirmation.

• Can I modify a booking?

Yes, something unexpected can always happen, so you can change the time or day of the lesson. You can do it from your personal area in "Scheduled lessons" through the option "Change date".

• How does a lesson at Classgap happen?

The class is done through classgap’s virtual classroom. Classgap was developed specifically for educational purposes, including many useful features such as: digital whiteboard, online text editor, webcam, screen sharing and many more.

Other recommended online Chemistry teachers:

$11 /h 20 minute trial lesson





Chemistry, Organic Chemistry, Inorganic Chemistry, Applied chemistry, Analytical chemistry

I have experience with students who have had hard times understanding chemistry and because of that, I communicate assertively with everyone intereste...