THIS THAT THESE THOSE

https://www.youtube.com/watch?v=eUazfCkQq84
https://www.youtube.com/watch?v=BcxmWhY-zx8

http://www.agendaweb.org/grammar/demonstratives-exercises.html

http://www.freddiesville.com/demonstrative-pronouns-games-this-that-these-those/