1. http://atschool.eduweb.co.uk/rgshiwyc/school/curric/Spanish/Cam1Uni1/8.htm An easy matching activity to get you started!
2. http://www.northwood.org.uk/spanish%20days%20of%20the%20week,.html You can click on each day of the week and hear it being pronounced in Spanish.
3. http://www.bbc.co.uk/schools/primarylanguages/spanish/my_calendar/games/magic_cards_days/ A card game with the days of the week.
4. http://www.proprofs.com/games/word-games/hangman/spanish-days-of-the-week-hangman-3/ A game of Hangman with days of the week.
5. http://www.learnalanguage.com/popup/main.php?language=spanish&source=the-months-and-days&lessonD=memory-machine&ref=http://www.learnalanguage.com/learn-spanish/spanish-words/months-and-days.php An easy multiple choice game with months AND days mixed together!
And here's a YouTube video with a song about days of the week!