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1. Tardy passes.  The picture below represents all of the tardy passes I have received all semester, along with passes to the nurse and passes to assistant principals for discipline.  That stack represents a lot of lost learning time, especially when you realize that these passes are written for a lot of the same students over and over again.  If learning was really valued, there would be preventative action taken rather then just letting students be late and lose valuable learning time.

2. Announcements during class time.  For the first four years of my teaching career, I worked in a district where it was in the contract that no announcements could be made during class time other than regularly scheduled announcements during a set period.  Consequently I started teaching not knowing the agony of having my class interrupted with announcements about homecoming, meetings, or sports cancellations, and then having student attention diverted to those topics rather than what they are supposed to learn.  I always hear about cell phones being a distraction to students, but random announcements that could have waited until another time (or be made in another way) during a class can be just as much of a distraction from the real reason students are in the building. 3. Letting students talk among themselves for the last 5 minutes of class.  I am known as the strict teacher because I believe in bell-to-bell instruction.  I only have 50 minutes a day to cause understanding in my students, and I want to use all of that time.  Some students and some teachers find this unreasonable of me.4. Pulling students out of class for things that are non-learning related.  This school year alone I had students pulled out of class to talk about sports participation opportunities and to do something for an extra-curricular activity that was supposed to be done after school.  I even had a student pulled out of my class during a test because another teacher simply demanded it.  Now, I'm not against sports or extra-curricular activities; I feel they are a valuable part of a student's school experience.  It's when they start to take priority over learning that I have a problem.

In many schools in the United States, students struggling the most in mathematics at the start of high school have the worst odds of getting a qualified teacher in the subject, new research finds. Succeeding in freshman-level mathematics is critical for students to stay on track to high school graduation, with students who make poor grades in math in 8th and 9th grades more likely to leave school entirely.

The consideration of cord length is very important in a bungee jump—too short, and the jumper doesn’t get much of a thrill; too long, and ouch! In this lesson, students model a bungee jump using a Barbie® doll and rubber bands. The distance to which the doll will fall is directly proportional to the number of rubber bands, so this context is used to examine linear functions.

By the time the 15 minutes were up, they had spent only about 65 percent of the observation period actually doing their schoolwork.

Attending to multiple streams of information and entertainment while studying, doing homework, or even sitting in class has become common behavior among young people—so common that many of them rarely write a paper or complete a problem set any other way.

o detrimental is this practice that some researchers are proposing that a new prerequisite for academic and even professional success—the new marshmallow test of self-discipline—is the ability to resist a blinking inbox or a buzzing phone.

At Exeter, I learned that what you said was more important than what you knew. I learned that the louder you are, the better you are. I learned that there's only one way to learn anything, and that's to talk in circles until someone takes notice.

Matt Townsley HS math educator turned curriculum & technology directorAssessment enthusiast

Did you ever read a book called “The Number Devil”  by Hans Magnus Enzensberger? If you ever see a copy of it, grab it and have a look. In chapter one, Robert, the hero of the story, meets the Number Devil. The Number Devil explains to Robert that knowing a little bit of arithmetic, such as addition and subtraction, is quite useful for when the batteries of your calculator run out but really it has little to do with mathematics. How often do teachers fail to grasp the distinction? How often do we overstate the importance of the “skills” that we fail to recognize the importance of their application? It’s like a football team that focuses so much energy on their training sessions that they forget to turn up to play their game.

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The problem involved mathematical equivalence (i.e., 4+5+7=__+7), which is known to be critical to later algebraic learning. In the speech-only videos, the instructor simply explains the problem. In the other videos, the instructor uses two hand gestures while speaking, using different hands to refer to the two sides of the equation. Students who learned from the gesture videos performed better on a test given immediately afterward than those who learned from the speech-only video. Another test was given 24 hours later, and the gesture students actually showed improvement in their performance while the speech-only students did not.