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Why learning with Classgap?

Satisfaction guaranteed

If you're not completely satisfied after your first class, we'll refund your purchase. more info

If you didn't do the lesson, it's cancelled or you are not completely satisfied within 24 hours passed your first lesson, we'll help you find a new tutor or refund your purchase.

Change the date at any moment

You will be able to reschedule the class if you can't assist.

Pay once you've received the lesson

We will make the payment of the lesson when finished more info

You will need to enter your payment details. In the case of individual class bookings the amount will be charged at the time of the class, but in the case of packs the payment is made in advance.

Dr. F.

He's from United Kingdom , currently lives in Mexico



over 10 years of experience teaching online classes

  • Maths
    Applied Mathematics High sc. / Sixth form, University
    Calculus High sc. / Sixth form, University
    Linear Algebra High sc. / Sixth form, University
    Statistics High sc. / Sixth form, University
    Basic Math High sc. / Sixth form, University
    Geometry Middle sc., High sc. / Sixth form, University
    Trigonometry Middle sc., High sc. / Sixth form, University
    Numerical Analysis High sc. / Sixth form, University



GermanBasic knowledge

FrenchConversational skills

CatalanBasic knowledge

EnglishConversational skills

PortugueseConversational skills

ItalianConversational skills


Degree Matemáticas Aplicadas Y Computación
Master/Postgraduate Matemáticas
Ph.D. Matemáticas


My name is Freiheit Sampson. I have Ph. in mathematics and I love to research, but my true passion is advising people. During my life I often needed theoretical assistance and discovered how alone the student is in front of new knowledge, so I promised to do my part to help anyone who, wishing to be better, and encounters obstacles. I have more than 15 years dedicating myself to this and I will continue doing this as long as I had life.

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

Dr. F. accepts bookings with at least 24 hours in advance.

hours Monday

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

leer aprender idiomas literatura escribir


Conoce, sabe trasmitir sus conocimientos y es hábil para enseñar y muy paciente
Mirko Comito Viola
20 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.

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