I will start with the first one:
1) socioeconomically integrate the schools (biggest bang for the achievement buck ever);
Find blog posts here and here and here, with citations to some of the research. Other evidence here and here, and here is my essay review of Gerald Grant's must read book, Caught Between Hope and Despair. . .
For the latest on the best evidence, still, even after 45 years, see index entries for "Coleman, James" in The Mismeasure of Education, and you will find new insights into why James Coleman was right--who you go to school with matters even more than differences in resources between poor and rich schools.