Membership:
https://partner.microsoft.com/en-us/membership/maximizing-your-membership
Internal Use Software Membership:
https://partner.microsoft.com/en-us/membership/internal-use-software
Partner Offers Competency Value packs:
https://www.microsoft.com/en-us/learning/partner-offers.aspx
Partner University Programs and Training:
https://partner.microsoft.com/en-us/training/programs-learning#Technical_presales_and_deployment