Rambam b’Iyun: Tefillin, Mezuzah, v'Sefer Torah

Teffilin Shel Yad and Shel Rosh One mitzvah or perhaps two? Why does the Rambam change the order? Beautiful explanation's of the Rogachover Gaon and the Rebbe

Putting on Tefillin at Night? A Personal Anecdote with the Rebbe

רש״י ר״ת שמושא רבא וראב״ד