Say or tell?

Exercise in English:

http://www.learnenglishfeelgood.com/sp/vocabulario-tell-say1.html

Brief explanation in Spanish:

http://www.ompersonal.com.ar/omgrammar/say-tell.htm

Brief explanation in Spanish and exercise:

http://www.ejerciciodeingles.com/ejercicios-say-tell/

Say and Tell exercise with answers:

http://www.perfect-english-grammar.com/say-or-tell-exercise-1.html

Explanation in English and final quiz:

http://www.englishclub.com/vocabulary/cw-say-tell.htm

Say, tell and ask, explanation with exercise:

http://www.ecenglish.com/learnenglish/lessons/how-use-say-tell-and-ask