Past Simple
Click here for an extensive explanation in Dutch! It also has some exercises in it!
Here is another (a bit shorter) Dutch video about the past simple!
Online exercises
Go here for two exercises on the past simple:
http://www.montsemorales.com/gramatica/PastSimRegPdc.htm
http://www.montsemorales.com/gramatica/PastSregular1y2.htm
Click here for more exercises on the Past Simple.