Meaning of SCALOGRAM in English

[sca.lo.gram] n [[6]scale + -o- + -gram] (1944): an arrangement of items (as problems on a test or features of speech) in ascending order so that the presence or accomplishment of an item at one level implies the presence of or the capability to accomplish items at all lower levels

Merriam-Webster English vocab.      Английский словарь Merriam Webster.