With homework, quizzes, tests, participation, reports, projects and final exams all weighted differently, calculating your grade for a high-school or college class can be an algebraic challenge. For example, suppose you got an 83 on the midterm, and 91 on …[Continue]
How to Check if Your Gmail Password was Leaked
This week saw the announcement that yet another database has been hacked. This one held a whopping five million Gmail addresses and passwords. Most of the announcements also linked to a third-party site where you could check to see if …[Continue]
3 Free Web Citation Tools
A bibliographic citation should supply sufficient details so that the item (book, movie, website, etc.) is uniquely identified. The most common citation styles are MLA (for the humanities), and APA style (for psychology). But many other styles exist, including CSE …[Continue]
Are USB Chargers All the Same?
It took me many years to discover that not all USB chargers are the same. So exactly what is it that differentiates USB chargers? Charge rates. The chargers themselves have charge rates that vary from 1A to 2.1A, and even …[Continue]
How to Delete Comments on Instagram
Yes, you can delete your own Instagram comments, whether posted on your photo or someone else’s. And (best of all!) you can delete any comment on one your Instagram posts. I recently received a hate storm of vicious comments on …[Continue]
4 Free Online Coding Classes
I’ve written before about sites that introduce school kids to programming, but these four sites offer college-level programming for free. All of these resources are Massive Open Online Courses (called MOOCs) that serve thousands of students at a time, and …[Continue]
How to Borrow a Kindle Book from Your Public Library
I love libraries, but over the years, as I transitioned to nearly 99% Kindle reading, I used the library less and less, switching instead to 99% Amazon. And while it’s true that I still get a nice fix of free …[Continue]
Kid-Safe Browsing on iPad or iPhone
In addition to the built-in IOS parental controls, you can fine tune iPad and iPhone safety by choosing the right browser. But in order for these kid-friendly browsers to be effective, you MUST disable the native iOS browser Safari and …[Continue]
