Please, recommend me textbooks and sites for learning Czech.
Thanks for including this resource. There is a lot more useful information there than just about the cases.
I have used three textbooks so far. Czech Step by Step by LIda Hola. Česky Den only available online as far as I know and Česka Čítanka by Ilona Kořánová which is my favorite but not for beginning students.
I agree Czech Step by step is good. I have all the books. One thing I'd note you really do need a native speak to help guide you through them otherwise your pretty much on you own.
I have a list here with resources for Czech learners, including books and sites: https://docs.google.com/spreadsheets/d/1g2BSxgYApVqlb9U7aMN7g_fXJg6Lwx4q7KvrAB6xso8/ I continue to add resources as I come across them.
That's very nice of you to share such informations it is very interesting and lots of time for you ! Thank you !