Back in the old days (okay, maybe more like the 1980s), teachers held lifetime certifications. Sometime in the 1990s, that all changed. States mandated that teachers renew their licenses, typically...

Somewhere along the road, you likely encountered a problem of this type on a standardized test: In the following sequence, which number is missing?{78, 71, 64, 57, ___, 43, 36}A. 51B. 50C. 49D....

Monty Hall was a Canadian television and radio personality, best known for being the long running host of the popular game show Let’s Make a Deal. One of the games that was frequently featured...

This lesson is part 2 of What to Know for the SAT. If you haven’t read the first part yet, do so here: What to Know for the SAT (Math-Formulas and Last Minute Tips) [Part 1] Radical...

The SAT is coming up! Are you prepared? If you need to brush up on some of your math skills, then read on! In this lesson, we’ll go through 7 Important SAT Math Topics. On the SAT, there are 58...

When we use statistics to analyze data, we often use mean (to find center) and standard deviation (to find spread). It is important to understand how standard deviation applies to data values that...