Four Ferries

Digital learning

4fNotesOnline-image

4f Notes Online

A digital notebook page that runs online. Particularly well suited for creating mathematical content. Read more...  

4fNotes-image

4f Notes App

A personal digital notebook for creating mathematical content. Runs on your own laptop. Used also in the Finnish national matriculation exam. Read more...

4fChecker-image

4f Checker

An automatic checker which allows you to check if your derivation is mathematically correct. Read more...  

eMath-textbooks-image

eMath books

An interactive textbook series. Cover all the central topics in high school mathematics (grades 10 -12).  Read more...                                                                

4fStudio-image

4f Studio

A complete digital learning platform, with  notebooks, textbooks, and courses.Read more...                                       

sd

Structured Derivations

Present your mathematical derivations in a way that shows the underlying logical structure and mathematical justification. Read more...                                       

4f Notes Online 4fNotesOnline-image

An online notebook page. Paricularly well suited for editing mathematical content. You can create text with standard math notation, function graphs, geometric figures, structured derivations, etc. Save the page on the server and share it with others. Derivations can be checked with 4f  Checker.  Read more...


4fChecker-image4f Checker

Let the computer check your calculations, derivations and proofs. Requires 4f Studio or 4f Notes Online. The checker goes through your derivation step by step and points out the weak spots and potential problems in your mathematical arguments. Try it by registering as a 4f Notes Online user, you will get 20 checks for free. Read more ...

4f Studio4fStudio-image

A complete interactive learning environment with digital notebooks, digital textbooks,  and digital courses. Teachers can create their own course material and lecture courses in the environment. Work offline, go online when needed. Read more... 



4fNotes-image4f Notes App

A personal digital notebook for creating mathematical content: texts with math formulas,  function graphs, geometric figures, structured derivations, etc . Runs on your own laptop. Read more ... 

eMath TextbookseMath-textbooks-image

A digital and interactive textbook series for high school. Covers all standard mathematics courses. Mathematical arguments made easy to follow by using structured derivations and step-by-step proof presentations. Use in 4f Studio or download as separate tablet app.  Read more ...


Structured Derivations  sdtutorialfi

A new method for presenting mathematical arguments in an easily understandable way. Makes it easier for students to follow and understand teachers solutions. Can use computers to check the correctness of a structured derivation. Structured derivations can be used for all kinds of mathematical arguments: computatioms, equation solving, simplifications and theorem proving. Works for all levels of mathematics.  Read more ....