- Educational Codeforces Round 1 (http://codeforces.net/contest/598)
- Educational Codeforces Round 2 (http://codeforces.net/contest/600)
- Educational Codeforces Round 3 (http://codeforces.net/contest/609)
- Educational Codeforces Round 4 (http://codeforces.net/contest/612)
- Educational Codeforces Round 5 (http://codeforces.net/contest/616)
- Educational Codeforces Round 6 (http://codeforces.net/contest/620)
- Educational Codeforces Round 7 (http://codeforces.net/contest/622)
- Educational Codeforces Round 8 (http://codeforces.net/contest/628)
- Educational Codeforces Round 9 (http://codeforces.net/contest/632)
- Educational Codeforces Round 10 (http://codeforces.net/contest/652)
- Educational Codeforces Round 11 (http://codeforces.net/contest/660)
- Educational Codeforces Round 12 (http://codeforces.net/contest/665)
- Educational Codeforces Round 13 (https://codeforces.net/contest/678)
- Educational Codeforces Round 14 (https://codeforces.net/contest/691)
- Educational Codeforces Round 15 (https://codeforces.net/contest/702)
- Educational Codeforces Round 16 (https://codeforces.net/contest/710)
- Educational Codeforces Round 17 (https://codeforces.net/contest/762)
Educational Codeforces Round 18 and laters are nicely organized in this blog (https://codeforces.net/harbourspace).
Special thanks to shahidul_brur for his kind update on this event.
Experimental Educational Round: VolBIT Formulas Blitz
Auto comment: topic has been updated by ivplay (previous revision, new revision, compare).
Auto comment: topic has been updated by ivplay (previous revision, new revision, compare).
Auto comment: topic has been updated by ivplay (previous revision, new revision, compare).
Can't you just go to Edvard's blogs (link)?
And rest of the rounds (from Round 18 till now) are arranged by Harbour Space University. To find all of these rounds just go to this link: Harbour Space University
Auto comment: topic has been updated by ivplay (previous revision, new revision, compare).