Tuition mathematics & mental arithmetic

Building the foundation to success

A solid grasp of maths is essential for students in their future careers. Here, the aim is to consolidate the skills required in academia while also laying the foundations for related subjects such as physics or chemistry. Students often enjoy maths at the beginning, but then either lose faith in their skills over the years, or more and more gaps accumulate, which puts them at a great disadvantage for future lessons. porta mundi focuses on the consolidation and understanding of the core competencies to help students in their current academic topics. A great deal of attention is paid to mathematical reasoning skills, as these often cause difficulties from a linguistic point of view. We also teach strategies for the right approach. This means that tasks are not viewed as individual problem areas. Instead the assignments are dealt with across topics so that students can develop a comprehensive understanding of mathematics.

How to solve confusing and complicated text based tasks

Tim has received 145 francs from his mother and has to buy 10 melons, 13 Emmental cheese and 5 kilos of olives with it. How much return money does he receive if the exchange rate has risen by 12% and a 5% discount is taken into account because of the pre-Christmas period? With porta mundi, even the most complicated text problems are easy to understand.

Kopfrechnen - gezielt geübt

Calculation skills are extremely important – not just in school but in many other areas of life too. Often this is practiced briefly in primary school, but then not sufficiently revisited. This causes students to lose speed and confidence. It also makes the rest f the maths lessons more difficult and means students are even more likely to use a calculator, even for routine sums. porta mundi wishes to counteract this trend and therefore regularly incorporates mental arithmetic into its coaching sessions. The knowledge gained in this way not only has a positive effect on mathematical matters,
but also on the students’ self-confidence.

Dyscalculia - to understand & to treat

In addition to the normal tuition and support activities in the field of mathematics, porta mundi also offers another very essential service in the field of dyscalculia. The subject of dyscalculia as a difficulty is very hard to understand, but if it is thought to be present, it is important to analyze the symptoms carefully. At porta mundi, we take this need seriously. Our specialists in the field of dyscalculia are Peter Lee and Andreas Kegel. With many years of experience, both of them can assist in the identification of a possible dyscalculia as well as in the development of therapeutic approaches. You can find more information on our dedicated page about dyscalculia.


Faster than your pocket calculator - We show you how!

"4+4x3 = 24 OR 4+4x3 = 16?" With porta mundi you can compete with any pocket calculator!


"Porta Mundi and Franziska have done an excellent job in making learning fun for the kids. Franziska is very professional, patient and thoughtful of each individuals needs. I highly recommend Porta Mundi for tutoring or exam preparation."

K haft pm rating 2023

K. Haft, Herrliberg

"I am very pleased to share the great experience that we are having with Portal Mundi. My son is taking German lessons with Frau Basler since several months. His level of German has increased significantly. He is really engaged and encouraged to learn, having a great connection with Frau Basler who is very clear and patient!"

V belen pm rating 2023

V. Belén, Küsnacht

"My daughter is taking maths online with the PortaMundi Group. The online component works really well and fits in with her busy schedule. The tutor is lovely and the Porta Mundi group were very easy to communicate with in terms of what we were looking for, from classes. My daughters ability and confidence in maths has increased. It has been a very positive experience."

M cronin pm rating 2023

C. Margo, Küsnacht

"My tri-lingual son needed help in German and Franziska has been great. I was a bit sceptical if my son would stay focussed with on-line classes but he has. He even says he loves the class and that they are going well. It's clear when talking to her, that Franziska puts the child first. She is really easy to work with and is open to feedback."

Nanda sandhu 2023 rating porta mundi

N. Sandhu, Zürich

"It has been a very pleasant experience dealing with Franziska. She took her time to explain what I was asking. The extra tution definitely has help my children."

Josephine wood 2023 rating porta mundi

J. Wood, Erlenbach