educational capability; teaching ability
Refers to the overall power or capacity of an individual, institution, or system to educate effectively. Often used in discussions of school quality, teacher training, or national education policy.
The educational capability of this school is rated very highly.
Training was held to improve the teaching ability of the teachers.
指導力 means leadership or coaching ability, often used in sports or business, whereas 教育力 is more focused on formal educational settings.
Compound of 教育 (education) and 力 (power, ability). The exact historical derivation is uncertain, but the term is a straightforward modern coinage.