This is to simply document my observation which I've been mulling over for a long time until very recently.
A couple of streets that I daily drive over are lined with trees whose branches seem to exhibit strange growth pattern. While their older branches point unremarkably each other way, the younger ones sprout pretty much verticallyEnvironmental impact of power lines is a post from: CTK Insights
Ready for some fun? Grab a copy of Ben Franklin and His Magic Squares to read aloud. Stop reading after it says, "Now Ben wondered if he could make the numbers [1-9, in a square] add up to 15..."Give each student a set of 9 milk caps (I don't EVER throw them away!) to number, 1-9.Challenge them to make a 3 x 3 array in which every row, column, and diagonal totals 15.If they think they've found the answer, have them scurry off to write it down! (And hide it from everyone else!)Stop periodically […]
Connie Schrock and I recently presented a webinar on Great Tasks: What is a “great task”? How is a great task used effectively in the classroom? Published by the National Council of Supervisors of Mathematics (NCSM) with support from Texas Instruments, NCSM Great Tasks for Mathematics 6-12 provides opportunities for students to explore meaningful mathematics […]
Jovana Helms just sent me the following:Hi Igor, I am looking for a graduate summer intern with CS background to help on a research project at Sandia National Labs in Livermore, CA. Could you please post the position on Nuit Blanche? Please note that US citizenship is required for this position. https://ws11snlntz.sandia.gov/psp/applicant/EMPLOYEE/HRMS/c/HRS_HRAM.HRS_CE.GBL?Page=HRS_CE_JOB_DTL&Action=A&JobOpeningId=646028&SiteId=1&PostingSeq=1 Thanks,JovanaJovana