also: いちくみ
one class (of students); one group (of people); one set (of items); one pair
Used to count one unit of a group, class, set, or pair. The reading ひとくみ is standard; いちくみ is rare.
This school has classes from group 1 to group 3.
I bought one set of teacups.
一組 is a general counter for one set or pair of things (e.g., gloves, a couple), while 一足 is used specifically for one pair of footwear like shoes or socks.
Standard kanji spelling for the reading ひとくみ.
Alternate reading いちくみ is rare and may be used in some contexts.
Compound of 一 (ひと, 'one') and 組 (くみ, 'group, set, class'). The reading ひとくみ follows the native Japanese counting system.