British councils learn English pages

From learnenglish.britishcouncil.org/en you can find good stuff for kids m, teenagers and grown ups

Adjustable english exercises

How much and how long ? Choose and do exercises in cambridgeenglish.org

Easy english

Esolcourses have exercises for beginners

Printable English exercises

mes-english.com has vast variety of printable exercises in various topics. Good for beginners

English exercises

englisch-hilfen contains many exercises for english