Grammar topics

April 29

Comparatives and superlatives

http://chagall-col.spip.ac-rouen.fr/IMG/didapages/comparative/index.html
http://www.curso-ingles.com/gramatica-inglesa/compar.php
http://www.saberingles.com.ar/curso/lesson12/04b.html

April 22

Present perfect:

http://mansioningles.com/gram40.htm

April 3

Simple present:

http://mansioningles.com/gram39.htm
http://www.inglesmundial.com/Basico/Leccion4/Gramatica.html

Frequency adverbs:

http://www.inglesmundial.com/Intermedio/Leccion3/Gramatica.html
https://www.youtube.com/watch?v=-EMb19c4Z70