7 1 50 Maria Montessori Primary Author mixed material 9789079506293 Netherlands Montessori-Pierson Publishing Company 2016 sdflksjdlkfjlsekjr9834534u85.jpg.jpg Maria Montessori Primary Author mixed material 9789079506064 Montessori-Pierson Publishing Company 2007 uk_vol16_omsl_ami_geometry_2edr_1.jpg.jpg Shape Work Bobby George Primary Author June George​ Primary Author Alyssa Nassner Illustrator mixed material 9781419709357 Abrams Appleseed 2013 81m3QuhwBQL._AC_UF1000%2C1000_QL80_.jpg.jpg Kumon Publishing Primary Author mixed material 9781934968666 north america Kumon Publishing 2009 968666.jpg.jpg Kumon Publishing Primary Author mixed material 9781934968673 north america Kumon Publishing 2009 81gljKnNPSL._AC_UF1000%2C1000_QL80_.jpg.jpg Axel Winkler Primary Author mixed material 068201 Netherlands Nienhuis Montessori 2018 images_%2810%29.jpg.jpg Dale Gausman Additional Author NAMC Primary Author mixed material Hoboken, NJ PT. Mandiri Jaya Abadi 2006 cover_math-2-lower-elementary-6-9-20240619133454.jpg