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View Article  The Principal’s Flyer Volume 5 February 8 – 12, 2010 Number 23
Lockdown procedures are now part of every school. and they sit in a book placed somewhere accessible in each classroom. I always worried that something would interfere with the specific steps to be taken, and throw the process off. Can you think of everything and the remember to follow it?   more »
View Article  How to select a good teacher candidate
What skills really matter?   more »
View Article  Massachusetts' Failing Grade
The grades were low nationwide.   more »
View Article  Now We'll Be Positive
The focus has changed.   more »
View Article  Washington Post Editorial Hits Teachers Unions
Does Randi Weingarten have any clout?   more »
View Article  The Principal’s Flyer Volume 5 February 1 – 5, 2010 Number 22
Busy, busy, busy. 2009-2010 Part Deux and plans are already being made for next year. Notice Mike's comment on the MCAS-"The bar has been set..."   more »
View Article  Leadership without excuses.
You know them when you hear them.   more »
View Article  Scholars Identify 5 Keys to Urban School Success
It's hard to argue with this amount of data.   more »
View Article  The Principal’s Flyer Volume 5 January 25 – 29, 2010 Number 21
FHS kids do a lot!   more »
View Article  One good step deserves another
Is the AFT moving ahead?   more »
View Article  How to improve one's blog.
It didn't work for me.   more »
View Article  The Principal’s Flyer Volume 5 January 19 – 22, 2010 Number 20
Mike takes on technology at home and school.   more »
View Article  Albany bows to unions.
Race to the Top deadline nears.   more »
View Article  The New York Times is happy too.
More on school reform.   more »
View Article  Shining Moment for Ed Reform
The Globe sure is happy!!   more »
View Article  What Makes a Great Teacher?
TFA is more than teacher recruitment.   more »
View Article  The Principal’s Flyer Volume 5 January 11 – 15, 2010 Number 19
At least Mike didn't mention the Patriots' loss.   more »
View Article  Ted May
One reader fewer.   more »
View Article  Finally
Why Does it Take So Long?   more »
View Article  Deadline Nears
With funds low, Race to the Top money is even more attractive.   more »
View Article  The Principal’s Flyer Volume 5 January 4 – 8, 2010 Number 18
Mike's sounds enthusiastic-surprise?- about the new year and new decade. Check out the historical stats on grading. What happened in 2007?   more »
View Article  Vacation Week
Identify the Baby   more »
View Article  The Principal’s Flyer Volume 5 December 21 – 23, 2009 Number 17
There is always a dilemma for good principals around budget cuts. How do you keep spirits positive while letting people know how bad things are.   more »
View Article  Kim Marshall's Straw Horse.
We need to see education differently.   more »
View Article  A Survey
Time for your input.   more »
View Article  The Principal’s Flyer Volume 5 December 14 – 18, 2009 Number 16
Does Mike shovel too? Check out the student health info. It's could be useful for other schools.   more »
View Article  Education and the Media
More but not enough!   more »
View Article  Don't Throw Out the Baby with the Bath Water
It's not always what it appears to be.   more »
View Article  The Principal’s Flyer Volume 5 December 7 – 12, 2009 Number 15
The statistic of the week shows the age of teachers in the largest 30 schools in Massachusetts. It's quite interesting where the majority fall in the different kinds of schools.   more »
View Article  Courageous Idea!
Expected Response.   more »
View Article  The Little 'MO
A Different Way to Look at It   more »
View Article  The Principal’s Flyer Volume 5 November 30 – Dec. 4, 2009 Number 14
Did that traffic backup shorten today's Flyer?   more »

The sum of the positive odd integers less than 50 is subtracted from the sum of the positive even integers less than or equal to 50. What is the resulting difference?

Answer Choices
Answer below:

But every school is redeemable so long as it enjoys strong leadership, talented teachers, adequate funding, and enough hours in the day to make up for deficiencies in the home. And federal stimulus funds for education are available to those states willing to prove it. Boston Globe Editorial

The sum of the positive odd integers less than 50 is 1 + 3 + 5 + ... + 45 + 47 + 49, and the sum of the positive even integers less than or equal to 50 is 2 + 4 + 6 + ... + 46 + 48 + 50. When the first sum is subtracted from the second, the terms can be regrouped to form (2 minus 1) plus (4 minus 3) + ... + (48 minus 47) + (50 minus 49), which is just 1 + 1 + 1 + ... + 1, where there are 25 ones. Therefore, the correct answer is 25.