and HOCS questioning in general and analyzed and rated 26 clicker questions as a group. Raters then independently rated the remaining clicker questions. The Rater Team\'s work took place in February 2010.

The Rater Team consisted of seven participants from a large, public, Research I institution, including: four senior graduate students in the biological sciences, two professors in the biological sciences, and one lab coordinator in the biological sciences. At the time of this study, Rater Team participants who were graduate students had taught for a range of five to seven semesters, primarily as teaching assistants; Rater Team participants who were professors had taught for a range of 4--10 yr, primarily teaching upper-level courses for biology majors; the Rater Team participant who was a lab coordinator had more thanSyrian rebels have shot down a Russian warplane in north-western Idlib province on Saturday, the Russian defence ministry has confirmed.

The pilot of the aircraft, a Sukhoi 25, reportedly used his ejection seat after his plane was hit by a man-carried portable air defence missile.

He was later killed when rebels tried to capture him.

"The pilot managed to report the ejection in the area controlled by the militants of Jabhat al-Nusra, but later he died fighting the terrorists," a statement by the Russian ministry of defence said.

The downing of the aircraft has been claimed by Hay'et Tahrir al-Sham, commonly known as Tahrir al-Sham. The group is spearheaded by the former al-Nusra Front, which used to be al-Qaeda's branch in Syria.

A video circulating on social media shows a dead body of