Origo One is a new YouTube channel offering one minute math lessons for teachers and students. The first few videos in the series seem to be aimed at elementary school teachers. In the first video that I watched Origo One explains why teaching the "use ten" strategy is better than having students count on their hands to complete multiplication in their heads.
The second video that I watched featured the idea of having students look for pairs of numbers in the real world to reinforce the concept of doubles or multiplying by two.
Applications for Education
These Origo One videos aren't breaking new ground, but they do offer a nice and concise representation of some elementary school math teaching strategies.