what do you mean, data-driven instruction, milenny? >> so, basically, what we try and do is assess the children as frequently as possible. so, we try to assess them daily so that we can see how they're doing and not wait till the end of the test and then see that they failed. >> okay. does "assessment" mean tests? i hear "assessment" and -- >> assessment can be many things. a form of assessment might not mean a test. it might not equate to a quiz. it may just be a thumbs-up, thumbs-down. did you get it? do you understand? or it could be writing in response to a particular question and you're reading it to understand whether or not the students got the concept that day. >> okay. i can almost hear teachers at different paces." >> mm-hmm. >>, so if you assess, or you test, and half the class is here, and the other class is here, what happens next? how do you move forward? >> we use that data and try to review the next day to kind of catch them up. a lot of our teachers offer tutoring after school. some are willing even to come in on the w

milennials taking the blame for a big change. the household staple, that -- and a reminder that the sumner tunnel is closed right now because of a deadly crash. traffic is being diverted to the ted williams tunnel. olessa will have updates ahead. >> this is an editorial by wcvb president and general manager bill find. >> blockbuster, xerox, polaroid. these are three robust companies that failed to adapt to emerging technology. the technology like the smartphone and innovative competitorli businesses. you can easily name dozens more suffering similar fates. we envision a whole sector that could soon be added to the list -- the taxi industry. it doesn't take a fortune teller to see the end of traditional delivery services. uber and lyft are widespread across the world. they're cheaper compared to regular cabs in extreme a consumer friendly, easily hailed from your smartphone. imposing new regulations on the right healing services, establishing requirements for driver background checks, inspections, and insurance. the new law also c