A method for manufacturing synthetic porous crystalline MCM-56 material comprising the steps of: a) preparing a first reaction mixture containing sources of alkali or alkaline earth metal cation, an oxide of a trivalent element X, an oxide of a tetravalent element Y, zeolite seed crystals, and water, said first reaction mixture having a composition in terms of mole ratios of oxides within the following ranges: YO 2 /X 2 O 3 = 5 to 35; H 2 O/YO 2 = 10 to 70; OH - /YO 2 = 0.05 to 0.20; M/YO 2 = 0.05 to 3.0; said first reaction mixture further comprising zeolite seed crystals in an amount from greater than or equal to 0.05 wt. % to less than or equal to 5 wt. %, based on the weight of said first reaction mixture, wherein said zeolite seed crystals exhibit the X-ray diffraction pattern for an MCM-22 family material; b) adding directing agent R to the reaction mixture of step a) to form a second reaction mixture, having said directing agent R in terms of a mole ratio within the following range: R/YO 2 = 0.08 to 0.3; c) crystallizing said second reaction mixture of step b) under conditions of temperature of from 90°C to 175°C and a time for less than 90 hours to form a resulting mixture comprising crystals of said MCM-56 material and less than 10 wt. % non-MCM-56 impurity crystals based on the total weight of said MCM-56 crystals in said second reaction mixture, as identified by X-ray diffraction; and d) separating and recovering at least a portion of said crystals of said MCM-56 material from said resulting mixture of step c), wherein said organic directing agent R is selected from the group consisting of cyclopentylamine, cyclohexylamine, cycloheptylamine, hexamethyleneimine, heptamethyleneimine, homopiperazine, and combinations thereof, and wherein said crystals of said MCM-56 material has an X-ray diffraction pattern as shown in Table 1: Table 1 Interplanar d-Spacing (Angstroms) Relative Intensity 12.4±0.2 vs 9.9±0.3 m 6.9±0.1 w 6.4±0.3 w 6.2±0.1 w 3.57±0.07 m-s 3.44±0.07 vs a) preparing a first reaction mixture containing sources of alkali or alkaline earth metal cation, an oxide of a trivalent element X, an oxide of a tetravalent element Y, zeolite seed crystals, and water, said first reaction mixture having a composition in terms of mole ratios of oxides within the following ranges: YO 2 /X 2 O 3 = 5 to 35; H 2 O/YO 2 = 10 to 70; OH - /YO 2 = 0.05 to 0.20; M/YO 2 = 0.05 to 3.0; said first reaction mixture further comprising zeolite seed crystals in an amount from greater than or equal to 0.05 wt. % to less than or equal to 5 wt. %, based on the weight of said first reaction mixture, wherein said zeolite seed crystals exhibit the X-ray diffraction pattern for an MCM-22 family material; YO 2 /X 2 O 3 = 5 to 35; H 2 O/YO 2 = 10 to 70; OH - /YO 2 = 0.05 to 0.20; M/YO 2 = 0.05 to 3.0; b) adding directing agent R to the reaction mixture of step a) to form a second reaction mixture, having said directing agent R in terms of a mole ratio within the following range: R/YO 2 = 0.08 to 0.3; c) crystallizing said second reaction mixture of step b) under conditions of temperature of from 90°C to 175°C and a time for less than 90 hours to form a resulting mixture comprising crystals of said MCM-56 material and less than 10 wt. % non-MCM-56 impurity crystals based on the total weight of said MCM-56 crystals in said second reaction mixture, as identified by X-ray diffraction; and d) separating and recovering at least a portion of said crystals of said MCM-56 material from said resulting mixture of step c),