This is a short video that discusses the paradox of Zeno. It turns out that this paradox is not a paradox but rather an easy way to show that a geometric series converges (if |q| < 1) and to find a formula for the sum. Suitable for high schools.

English version in YouTube:

This is a series of calculus podcasts in English based on the materials of the Single Variable Calculus Lecture Notes by M. Seppälä.

A collection of public courses created on the basis of modules from the learning environment emilea-stat. The topics include, for instance, descriptive statistics (e.g., interactive visualizations of data, measures of location, dispersion and dependence, or elementary regression analysis) and related topics for teaching in secondary schools (like the stem-leaf plot and the Simpson paradox). All courses are in German.

The resource is the complete diagnostic testbank used for testing students entering the first calculus course at the University of Helsinki. This diagnostic test covers a large part of the normal high school curriculum in Finland. The test was originally written by Andre Heck and later slightly edited by Mika Seppälä. Actual diagnostic tests used contain a part of these questions, not all of them.

How do you draw a straight line? How do you determine if a circle is really round? These may sound like simple or even trivial mathematical problems, but to an engineer the answers can mean the difference between success and failure. This website contains interactive materials to support the book How Round Is Your Circle?, by John Bryant and Chris Sangwin. This book invites readers to explore many of the same fundamental questions that working engineers deal with every day. It also illustrates how physical models are created from abstract mathematical ones.

A general history of mathematics

The Online Single Variable Calculus is a full course at university level covering topics from Real Numbers, Functions, Differentiation, Integration, Series and Differential Equations. Each topic is organized in a module consisting of a Ten Minute Talk accompanied by Open Problems and Solved Problems. The material has been designed especially for online delivery.

Riemann Surfaces and Teichmüller Spaces by Mika Seppälä and Tuomas Sorvali. A graduate level book. Originally published by North Holland. Now out of print.

This is a demonstration class showing some samples of WebALT exercises for high school. The assignments cover a few topics from the comprehensive collection of WebALT exercises used in high schools.

This set of exercises will teach the student to compute limits of functions. A WebALT service.