"This is an important problem (STEM - Mathematics Education) that he is tackling which no one else before him bothered to." The first part of your sentence abo

"This is an important problem (STEM - Mathematics Education) that he is tackling which no one else before him bothered to." The first part of your sentence above is fine. The second part is not consistent with the record. There have been quite a number of initiatives and programmes to try and improve mathematics in Schools and Colleges over the past 40 years or so in England and Wales. I think I might need to go digging and put a list up somewhere.