joe del grasso and nathan saunders of washington, d.c. >> city schools are terrible because of unions like yours. >> i would disagree. we have progress as a result of unions. >> save our schools! >> three days before saunders led this protest march to complain about plans to pay teachers based on how well the students do on tests. the protesters even composed an antitest song ♪ i think i know why the union doesn't like testing. your results are awful. they are among the lowest in the nation. >> you make an argument that it is the lowest in the nation based upon the test scores. now, i would say that ours can get better but i would say that ours are -- >> your predecessors the unions have been saying that for years. >> the unions have a advocated for high quality ed glace but not achieving it. >> our test scores are not what we choose to focus on. we choose to focus on teaching kids. >> how do you know if they are learning anything if you don't test them and compare. >> i know my kids are learning when i look in their eyes. >> the protesters had celebrity is support. actor matt damon.