Here is an interesting German language math textbook, called "Mathematik," for Klasse 9 (9th grade). It has everything from statistics to algebra and geometry in it.

I can't read German very well, but the math problems are workable. If you don't want it for the homework, it might also make an interesting book for upcycling/ paper collage projects and decoupage, journaling, or similar uses.

This is a flashy blue and orange hardcover book with lots of math problems and some black and white pictures inside. There is also a loose triple folded flyer in the back that has a chart for things like multiplication and square roots.

It was printed in 1973 in Essen, Germany. 9 units with 3-4 sections in each, 241 pages, a full index and contents page. Unit titles are as follows: Wahrungs- und Diskontrechnen, Potenzrechnung, Wurzelrechnung (Radizieren), Quadratiche Aussageformen, Quadratiche Funktionen, Potenzen und Wurzeln, Ahulichkeitsabbildungen, Satzgruppe des Pythagoras, Kreisberechnung.

Dimensions:
9 in. Long x 6 1/2 in. Wide x 1/2 in. Thick (US)
23 cm. Long x 16.5 cm. Wide x 1.2 cm. Thick (Metric)

Condition notes: There is some minor scuffing along the bottom edge, some graphite smears on the covers, a child's signature inside the front cover, and a couple of pages with neatly-worked problems in pencil in the margins. All are normal signs of use as a textbook. I am selling this as is.

I ship this media mail with delivery confirmation in the US, or first class international. It is somewhat heavy because of the heavyweight board covers.