Table 1 Requests by database

Education Source

DE “Recommender systems” OR TI “Recommend* system*” OR TI “Recommender*” OR AB “Recommend* system*” OR AB “Recommender*”

ERIC

DE “Data Analysis” AND DE “Individualized Instruction” OR TI “Recommend* system*” OR TI “Recommender*” OR AB “Recommend* system*” OR AB “Recommender*”

Computers & Applied Sciences Complete

(ZU "recommender systems" OR ZU "recommender systems (information filtering)" OR TI "Recommend* system*" OR TI "Recommender*" OR AB "Recommend* system*" OR AB "Recommender*") AND (ZU "learning" OR ZU "education" OR TI learn* OR TI education* OR AB learn* OR AB education*)