Skousen, a chemist's daughter, directs her third-graders to conduct hands-on experiments — her force and motion unit is particularly popular — with self-discovery as their learning compass. I act as the mentor, the guide on the side, Skousen said.

So lovedst thou the lusty Hyacinct; So lovedst thou the faire Čoronis deare.

Our drift was south.

These issues could be investigated further by the use of animal models, by future RCT studies on the effects of micronutrition on pregnancy and gestational development, or by using the technique of Mendelian randomisation employing genetic variants associated with vitamin B12 and folate.