Education Nation Weekly Newsletter Education Nation // March 11, 2015 // 7:14 PM EST Saturday is Pi Day and this year it's a once in a lifetime celebration. Pi is equal to 3.141592653. Not only will the month and date line up, but so will the year and time! The entire NBCUniversal family is celebrating this exciting day. Our colleagues at NBC Learn have created a collection of free videos featuring math content and our Parent Toolkit website has 6 ways that parents can bring this mathematical constant to life for their kids. Join the conversation on social media by using #piNBCU. If you decide to indulge in a little pie for Pi Day, our new Parent Toolkit videos can help you get your eating habits back in line. Confused about serving sizes? We've simplified them with our latest original video. Also, don't miss a minute of action from the Teaching & Learning conference in DC. We will be live streaming the entire event on both ParentToolkit.com andNBCLearn.com. Can't watch the live stream? No worries! We will be live tweeting the event as well. This week in education news: Parents opt children out of the Common Core assessments; Secretary Duncan admits some kids are over-tested; and Las Vegas is in desperate need of teachers. As always, you can join the conversation on Facebook and Twitter. Obama Signs ‘Student Aid Bill of Rights’ to Help Protect Borrowers (New York Times, 3/10) Opt-Out Movement about More Than Tests, Advocates Say (US News & World Report, 3/10) Can the New Tests Quell Teacher Anger Over Common Core? (Hechinger Report, 3/10) Why Las Vegas Is Desperate To Hire Thousands Of Teachers (Huffington Post, 3/10) Federal Education Chief: Some Kids are Over-Tested (Sun Sentinel, 3/10) To Cut Deficit, LAUSD is Proposing Layoffs of Hundreds of Teachers (LA School Report, 3/9) Unequal Shelves in D.C. School Libraries Benefit Wealthier Students (Washington Post, 3/9) Hand Scorers Sought for Online Common Core Tests (Ed Source, 3/8) Study Investigates High Discipline Rates Among Black Girls (Philadelphia Public School Notebook, 3/6) The Man Who Snuck Into the Ivy League Without Paying a Thing  (The Atlantic, 3/5) Report: Number of Young Children Suspended from School Rises (AP, 3/5)

Students 'Prank' Principal with Kindness Senior-year pranks aren't exclusive to Wichita High School North, but Emily Jones' commitment to a positive practical joke on her principal wound up being more than just a drop in the bucket. More

Students Put Geometry to Work With Life-Size Foosball Wyoming high school students built a life-size foosball game as part of a lesson in geometry. More

Iron Maidens: High School Girls Build Robot in 6 Weeks Bronx Science teen Juno Lee is engineering her way into robotics — and gender equality in STEM fields.More