Steve Brizel writes:
Kedushas Kehunah and Kedushas Am Yisrael
R. Aharon Lichtenstein explains why non-Kohanim can and should emulate the Kohen in our everyday lives: link
R. Yisocher Frand illustrates why the Halachos of Tumas Kohanim, even for a minor, serve as the basis for the mitzvah of Chinuch: link
R. Zvi Sobolofshy explores numerous halachos related to Kedushas Kehunah and whether a Kohen can be a doctor: link 1 (audio), link 2 (audio)
R. Shlomo Riskin and R Avraham Gordimer explain why Kohanim must avoid Tumas Mes: link 1, link 2
R. Ephraim Buchwald explains why even a Kohen Gadol must involve himself with the burial of a Mes Mitzvah: link
R. Berel Wein reminds us that the Kohanim served both a special role in the Avodah in the Beis HaMikdash and as teachers of Klal Yisrael: link
Parshas HaMoados
R. Yitzchak Etshalom presents an overview of Parshas HaMoados: link
R. Michael Rosensweig explains the relationship between Shabbos and the Moadim: link
R. Baruch Simon explores numerous aspects of Hilchos Eruvin: link 1 (audio), link 2 (audio), link 3 (audio), link 4 (audio), link 5 (audio) (and many more as well)
R. Asher Brander explores why we do not say Borei Minei Bsamim on a Motzaei Yom Tov: link
R. Yissocher Frand, based upon two observations of Rav Shlomoh Zalman Auerbach, explains why Shabbos HaGadol reminds us of the difference between Shabbos and the other Moadim and why there is a custom to use the title “Reb” to call someone up for an aliyah: link
R. Dovid Hirsch, based upon the teachings of Rav Soloveitchik ZTL, explains the need for continuity in Sefiras HaOmer: link (audio)
R. Dovid Gottlieb discusses how one properly acquires the Four Species: link (audio)
R. Asher Weiss explores the foundations of Sefiras HaOmer: link
R. Mordechai Willig, based on Breishis Rabbah 61:3, offers another explanation for the death of the talmidim of R Akiva, and exhorts us to refrain from begrudging the success of others, especially during a time of financial downturn: link
R. Baruch Simon explains how to use the period of Sefiras HaOmer as a time for reaching a state of Shlemus HaAdam: link (audio)
R. Avraham Gordimer suggests why the Halachos of the Lechem HaPanim and the Menorah precede the episode of blasphemer: link
R. David Horwitz explains Shavuos seemingly has no visible symbol of commemoration: link
Last year’s roundup: link