For some years already I run an online course in programming, algorithms, and so on — algoprog.ru. Now I introduce an English-language version:
algoprog.org
It is an online course intended for a wide range of students, from complete beginners (even those who do not know any programming language) to relatively advanced and knowledgeable students. The course comprises a set of topics, from basics of programming (in Python) to really advanced algorithms and data structures. Most of the topics have a link to theory (currently mostly still to Russian-language theory, but I'm working on it), and then some problems (taken from informatics.msk.ru or Codeforces, with English statements).
Unlike the usual sites with an archive of tasks, while studying on algoprog you also get feedback from me. I will look throught you solutions, accept or ignore them, give advice how it could be written better, help with solutions that do not pass tests, etc. Also, for most problems there are "good solutions" that you can look at after you solve the problem, and there is a "Find a bug" section where you can practise finding bugs in other students' solutions. And, of course, you can always contact me about any questions that arise in the course of your classes, or about programming in general.
In particular, the point of the course is not only to learn how to pass all the tests, but also how to write clean and understandable code, and how to find bugs in the code without hunderds of submissions to the testing server.
I think that the course will be useful for all codeforces users with rating below 1700-1900 (or maybe higher too), and I'll be glad to see you in the course.
The detailed information about the course: https://algoprog.org/material/about!en
The materials of the course (topics, theory and problems) is available for free even for unregistered users. If you want to actually start studying on algoprog, that's for a fee (currently 2000 Russian rubles per month, that's approx. USD 32). Full payment info and conditions: https://algoprog.org/material/pay!en
UPD: Sometimes there are problems when paying with a non-Russian bank card, but generally such payments work. UPD2: There are two payments providers for non-Russian bank cards, both are used by some users.
About me:
My name is Petr Kalinin, I am senior developer at Yandex. I am bronze medalist of the International Olympiad in Informatics (IOI) 2001, and gold medalist of IOI 2002; as a member of Nizhny Novgorod State University team, I twice participated in the finals of the ACM International Collegiate Programming Contest (ACM ICPC).
In one form or another, I have been teaching programming to schoolchildren since I graduated from school in 2002 (I went as a teacher to various summer schools, etc.); I am teaching a separate course since 2013.
Among algoprog students of different years are (sorted by algoprog rating):
Stefan2417 — https://algoprog.org/user/505865
GandarfGamer — https://algoprog.org/user/315118
EndRay — https://algoprog.org/user/322702
Aleks5d — https://algoprog.org/user/254947
MADKIRUS — https://algoprog.org/user/267400
Riladavin — https://algoprog.org/user/260070
_DAC_ — https://algoprog.org/user/491124
...not to mention my brother KAN, who was in a sense my very first student, long before algoprog came into existence.
