Primary Mathematics has four editions: U.S. Edition, Standards Edition, Common Core Edition, and the 2022 Edition.

Primary Mathematics U.S. Edition
Almost identical to the original program from Singapore, but uses U.S. measurements and currency.

Primary Mathematics Standards Edition
Written to meet the California Public School standards prior to Common Core, this edition includes probability, data analysis, negative numbers, and coordinate graphing.

Primary Mathematics Common Core Edition
Aligns with Common Core. This edition has changes to the scope and sequence.

Primary Mathematics (2022 Edition)
Currently in soft launch. Content and lesson structure is entirely new and based on current classroom practices in Singapore.

Please note that Primary Mathematics is not for sale to customers outside of the U.S. and Canada.