m303I completed this course in 2016 and achieved a grade 2 pass. It's a very tough course, in my opinion. You should have completed M208 (or its equivalent) recently prior to starting M303 inStandard Specification for Lime for Asphalt Mixtures AASHTO Desnation: M 303-89 (2019) Technical Subcommittee: 3a, Hydraulic Cement and Lime Release: Group 1 (April) AASHIO