I am starting to get ready for the CSWP exam and I have not been working with the design tables links or Equations for some time so I have went to understanding how to setup and drive my models, to not beable to even made a dimension global or linked I look at the help and I have tryed what it is telling me to do but not having any luck with this

Can anyone tell me some other place to find more tutorials than the one that is in the online-tutorial of SolidWorks?