Here are links to posts, primarily older ones not readily accessible on the homepage, relevant to this time of year:
Three Weeks and Tisha B’Av:
2014: Shiur on the Three Weeks
2012: Halacha – A Capella Music During the Three Weeks
Parshat Mattot
2016: Thoughts on Parshat Mattot – Mi Ya’aleh B’Har Hashem
2014: Thoughts on Parshat Pinchas – Zealotry
2012: Thoughts on Parshat Pinchas
Classroom Declassified 