Education math program to manipulate matrices. Tkmatrix is an education math program to manipulate matrices. Matrices are part of linear algebra. It was developed for german students to learn algorithms and test own calculation. Therefore tkmatrix can give not even a solution but all algorithm steps as a report. It can calculate with float numbers and fractions (rational numbers of multiple precision). Solutions and protocols can be exported to ascii, html and latex files. It have nice Tk GUI. Tkmatrix have an Interface to Octave. It can load and save in octave format and use it as backend.