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In his eighth year at , , professor of and in the , exudes an infectious enthusiasm for teaching.

He teaches by example. He鈥檚 a video game enthusiast whose most recent game, , has surpassed 10,000 downloads from the Google Play store. Koala鈥檚 Quest is a puzzle game with various platforms in which a player explores levels and collects coins and keys while trying to find the way home.

Dr. Stemkoski鈥檚 learning-by-doing approach makes him popular with students.

鈥淗e has a unique personality, a very good vibe,鈥� said Evan Leider, a freshman from Long Beach, New York, who chose to attend Adelphi and major in computer science after taking in the summer of 2013. 鈥淗e makes it exciting to learn.鈥�

In Fall 2014, Dr. Stemkoski鈥檚 courses included History of Mathematics, Theory of Numbers, and Graphical User Interface Programming (writing computer programs). In Spring 2015, he鈥檚 teaching .

鈥淚 teach students how to make a video game,鈥� he said. 鈥淲e have a generation of people playing games on computers, consoles, tablets and smartphones. And computer science goes hand in hand with mathematics. Computer science is almost the formalization of mathematics. It鈥檚 very organized and the formulas have to be very precise.鈥�

Dr. Stemkoski earned his bachelor鈥檚 and master鈥檚 degrees from Boston University and thought he would become a high school math teacher. But the more he learned about math, the more he liked it. He earned a second master鈥檚 degree and a doctorate from Dartmouth College.

鈥淢athematics can explain all sorts of things,鈥� he said. 鈥淭he problems and successes in any civilization are sort of reflected in its mathematics and science.鈥�

How computer science and math relate to current events is a subject Dr. Stemkoski often discusses with his students. Case in point: the hacking of the computer system in December 2014. 鈥淎 lot of sensitive information was kept on servers but not encrypted,鈥� he said. 鈥淪ony assumed the front door was locked, so it didn鈥檛 have to protect the valuables inside.鈥�

One way Dr. Stemkoski tries to make math and computer science less intimidating is by having students listen to podcasts and watch videos outside of class.

鈥淚t gives them a sneak preview of what鈥檚 to come鈥攖his is what you鈥檙e going to learn today and this is why it鈥檚 important,鈥� he explained. 鈥淭hat makes the material easier to digest, so we can spend more time in class working on the more difficult things, like solving problems.

鈥淪omething I would be excited to work on would be the development of a list of adaptive tutorials for students to watch outside of class鈥攕hort videos, maybe 45 minutes or so, followed by questions for them to answer. If this section of the material makes sense, then they can go on to another short video. Face-to-face teaching gives me the power to see in the classroom if students understand the material or not. If technology can play a similar role for students outside the classroom, then that would be awesome.鈥�