Answer: Micro to Macro
Explanation:
Micro-level social phenomena is the mechanism or happening taking place in the society at small level or low scale.E.g- in a group, in local area etc.
Macro-level social phenomena is the process that get processed at a large scale level in the society.E.g- social pattern etc.
According to the question,researcher is displaying micro to macro level social phenomena as he is researching the problem from local school level to public school level.