Join Stephen as he breaks down mixed number addition step by step—starting with 5 1/4 plus 2 2/3. Learn how to convert mixed numbers to improper fractions, find the least common denominator, add and ...

We introduce an R implementation of the Bayesian Knowledge Tracing algorithm and its variants, which estimate student cognitive mastery from problem-solving sequences. The R package BKT is publicly ...

Pictured here is a map of the Partition of Africa. Photo courtesy of Stuart Rankin via Flickr Commons. The Scramble for Africa began with the Berlin Conference (1884–85) and ended by the early ...