Instructional Video10:14
Professor Dave Explains

Stereospecificity vs. Stereoselectivity and Regiospecificity vs. Regioselectivity

9th - Higher Ed
Many organic chemistry students think that specificity and selectivity are essentially synonymous when describing the potential products of a chemical reaction. But this is not true! They have separate meanings and imply different...
Instructional Video6:45
Professor Dave Explains

Peterson Olefination

9th - Higher Ed
Next in the series of olefination reactions is the Peterson olefination. This uses alpha-halo silanes and is quite fascinating, with a number of unique advantages. Namely, the stereochemistry of the alkene product can be controlled by...
Instructional Video
Sophia Learning

Sophia: Cognitive Theory: Lesson 3

9th - 10th
In this lesson you will learn about the mechanisms of cognitive theory, a perceptual theory of communications. It is 3 of 4 in the series titled "Cognitive Theory."
Instructional Video
Khan Academy

Khan Academy: Student Story: Prioritizing Size/selectivity/diversity/financial

9th - 10th
Listen to a student describe their college search process and what helped him decide on a school. [0:40]