Maria and Schulze are the same sculpt. Maria is always released as MSD/SDM G while Schulze is MSD/SDM B. Releases have all been in normal resin.
School molds are molds mostly released at painting classes at a Volks store or Dolpa. Any of these events that are known will be listed, but please note that they likely have more releases.
School releases: Kyoto Dolpa 3 (Maria–Schulze) – Seoul Sumika Workshop (Maria–Schulze) – Utsunomiya Workshop – Akihabara Workshop (Maria–Schulze) – Harajuku Workshop Dolpa 26 Week (Maria–Schulze) – Private Party in Tenshi no Sato Workshop (Maria–Schulze)
Coordinate model releases: Mado 05/13 (Maria–Schulze) – Mado 06/13 – Mado Private Party 06/13 – Tenshi Descend Fall 2013 – Mado 01/14 – Sato Golden Party Fall 2015 – Sato Spring Fair 2016 – Mado 05/16 (Maria–Schulze) – Sato Four Seasons Party 01/17
One-off releases: Sumika 08/11 – Sumika 01/14 – Sumika 10/19
Name: Schulze
Date: 10/19/19
Event: Tenshi no Sumika Monthly Release
Release Type: One-off
Body Type: SDM B
Name: Maria
Date: 01/28/17
Event: Tenshi no Sato Four Seasons Party
Release Type: Coordinate Model
Body Type: SDM G
Name: Schulze
Date: 05/19/16
Event: Tenshi no Mado monthly release
Release Type: Coordinate Model
Body Type: SDM B
Name: Maria
Date: 05/19/16
Event: Tenshi no Mado monthly release
Release Type: Coordinate Model
Body Type: SDM G
Name: Schulze
Date: 03/12/16
Event: Tenshi no Sato Spring Fair 2016
Release Type: Coordinate Model
Body Type: SDM B
Resin: PS Normal
Clothes: Volks Fullset
Price: 46000 (tax not included)
Name: Schulze
Date: 10/10/15
Event: Tenshi no Sato Golden Party Fall 2015
Release Type: Coordinate Model
Body Type: SDM B
Resin: PS Normal
Clothes: Volks Fullset
Price: 46000 (tax not included)
Name: Schulze
Date: 01/26/14
Event: Tenshi no Sumika monthly release
Release Type: One-off
Body Type: MSD B
Name: Maria
Date: 01/19/14
Event: Tenshi no Mado monthly relaese
Release Type: Coordinate Model
Body Type: MSD G
Resin: PS Normal
Clothes: Volks Fullset
Name: Schulze
Date: 09/21/13
Event: Tenshi Descend Fall 2013
Release Type: Coordinate Model
Body Type: MSD B
Resin: PS Normal
Clothes: Volks Fullset
Price: 49350 (tax included)
Name: Maria
Date: 06/22/13
Event: Private Party in Tenshi no Mado SD Rainy Day Party
Release Type: Coordinate Model
Body Type: MSD G
Resin: PS Normal
Clothes: Volks Fullset
Name: Maria
Date: 06/09/13
Event: Tenshi no Mado monthly release
Release Type: Coordinate Model
Body Type: MSD G
Clothes: Volks Fullset
Name: Schulze
Date: 05/19/13
Event: Tenshi no Mado monthly release
Release Type: Coordinate Model
Body Type: MSD B
Resin: PS Normal
Clothes: Volks Fullset
Name: Maria
Date: 05/19/13
Event: Tenshi no Mado monthly release
Release Type: Coordinate Model
Body Type: MSD G
Resin: PS Normal
Clothes: Volks Fullset
Name: Schulze
Date: 09/23/12
Event: Private Party in Tenshi no Sato Workshop
Release Type: School
Body Type: MSD B
Resin: PS Normal
Parts: MSD-L-01
Wig: W-64, natural, MSD size
Eyes: HG glass eyes, light violet, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Maria
Date: 09/23/12
Event: Private Party in Tenshi no Sato Workshop
Release Type: School
Body Type: MSD G
Resin: PS Normal
Wig: W-20 volume waffle, mixed gold, MSD size
Eyes: HG glass eyes, lavender with black line, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Schulze
Date: 12/17/11
Event: Harajuku Workshop Dolpa 26 Week
Release Type: School
Body Type: MSD B
Resin: PS Normal
Parts: MSD-L-01
Wig: W-64, natural, MSD size
Eyes: HG glass eyes, light violet, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Maria
Date: 12/17/11
Event: Harajuku Workshop Dolpa 26 Week
Release Type: School
Body Type: MSD G
Resin: PS Normal
Wig: W-20 volume waffle, mixed gold, MSD size
Eyes: HG glass eyes, lavender with black line, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Maria
Date: 08/14/11
Event: Tenshi no Sumika monthly release
Release Type: One-off
Body Type: MSD G
Resin: PS Normal
Clothes: a poco a poco
Design: Kinoko
Name: Schulze
Date: 10/03/10
Event: Akihabara Workshop
Release Type: School
Body Type: MSD B
Resin: PS Normal
Parts: MSD-L-01
Wig: W-64, natural, MSD size
Eyes: HG glass eyes, light violet, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Maria
Date: 10/03/10
Event: Akihabara Workshop
Release Type: School
Body Type: MSD G
Resin: PS Normal
Wig: W-20 volume waffle, mixed gold, MSD size
Eyes: HG glass eyes, lavender with black line, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Schulze
Date: 09/23/09
Event: Utsunomiya Workshop
Release Type: School
Body Type: MSD B
Resin: PS Normal
Parts: MSD-L-01
Wig: W-64, natural, MSD size
Eyes: HG glass eyes, light violet, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Schulze
Date: 08/23/05
Event: Seoul Sumika Workshop
Release Type: School
Body Type: MSD B
Resin: PS Normal
Parts: MSD-L-01
Wig: W-64, natural, MSD size
Eyes: HG glass eyes, light violet, 16mm
Price: 341000 won
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Maria
Date: 08/23/05
Event: Seoul Sumika Workshop
Release Type: School
Body Type: MSD G
Resin: PS Normal
Wig: W-20 volume waffle, mixed gold, MSD size
Eyes: HG glass eyes, lavender with black line, 16mm
Price: 327800 won
Comments: Released as a kit that must be assembled and painted by the owner. Only available at painting classes at a Volks store or Dolpa.
Name: Schulze
Date: 03/21/05
Event: Kyoto Dolpa 3
Release Type: School (Discontinued)
Body Type: MSD B
Resin: OS Normal
Parts: MSD-L-01
Wig: W-64, natural, MSD size
Eyes: HG glass eyes, light violet, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at this Dolpa class; this was the last oldskin release by Volks.
Name: Maria
Date: 03/21/05
Event: Kyoto Dolpa 3
Release Type: School (Discontinued)
Body Type: MSD G
Resin: OS Normal
Wig: W-20 volume waffle, mixed gold, MSD size
Eyes: HG glass eyes, lavender with black line, 16mm
Price: 32550 (tax included)
Comments: Released as a kit that must be assembled and painted by the owner. Only available at this Dolpa class; this was the last oldskin release by Volks.