This research synthesis. highlighting the middle level curriculum. was created as part of a working group within the American Education Research Association (AERA) Middle level Education Research Special Interest Group (MLER SIG) to advance middle level education research. The literature review that informed this research synthesis included middle level-focused. https://www.roneverhart.com/GLYKON-BAYONET-BEAD-BLAST-OVERLAY-STONEWASH-STANDARD-NICKEL-BORON-INTERNALS-184-10/