In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses the concept of Marbeh B’Shiurim, the question of whether one may expand on a Shabbat prohibition in a situation where it is permitted.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson explores the various laws of Maaseh Shabbos, which discuss whether one can benefit from an act of chillul Shabbat.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses whether of not it is permissible to benefit or use something which was created by someone performing a Shabbat prohibition.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson presents the issue of Hatmanah, insulating a food in order to retain its warmth, on Shabbat.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson instructs us on practical ways to warm up food on Shabbat.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson analyzes the difference between Melachot D’Rabbanan (Rabbinic Shabbat Prohibitions) and Gzerot D’Rabbanan (Rabbinic Ordinances), and how it impacts Shehiya and Chazara. The class also discusses the use of crockpots on Shabbat.

In this shiur (Torah class) on Hilchot Shabbat, Rabbi Shimon Isaacson concludes the laws of shehiya, leaving food on a fire on Shabbat, and introduces the laws of chazara, returning food onto a fire on Shabbat.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses the definition of shehiya (leaving food on a flame on Shabbos), and elaborates on the various types of shehiya. Rabbi Isaacson begins a discussion of how to apply these principles to using a blech, hotplate, and oven on Shabbos.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses how to prepare tea properly on Shabbat, and the prohibition on Hagasa (stirring) very hot food.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson explains why one may not cook in a kli sheni (secondary container), and reviews the Halachot of ‘iruy’ (pouring hot liquids).

In this shiur (Torah class) on Hilchot Shabbat, Rabbi Shimon Isaacson continues his explanation of the differences between kli rishon and kli sheini.

In this shiur (Torah class) on Hilchot Shabbat, Rabbi Shimon Isaacson explains the fundamental differences between kli rishon and kli sheini.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses the kli rishon (first degree of heated container), kli sheni (second degree of heated container), and kli shlishi (third degree of heated container), and explains the Halachot that refer to each, as regards to cooking or heating food on Shabbat.

In this Torah shiur on Hilchot Shabbat, Rabbi Shimon Isaacson explains the Halachic ruling of Ain Bishul Achar Afiya/Tzliyah. There is no additional cooking after an item has been baked or roasted, and how it applies to relevant questionable situations.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses the details for the Halacha that there cannot be cooking of a previously cooked item, and how the Halacha views baking after cooking.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson discusses the laws of cooking on Shabbat, focusing on the laws relating to liquid foods.

In this Torah shiur (class) on the laws of Shabbat, Rabbi Shimon Isaacon discusses the definition of Bishul (cooking) the status of partially cooking food on Shabbat.

In this Torah shiur (class) on Hilchot SHabbat, Rabbi Shimon Isaacson sums up the Melacha of Dosh and its contemporary applications, such as squeezing fruit and making ice.

In this Torah shiur (class) on the laws of Shabbat, Rabbi Shimon Isaacson teaches the Melacha of Dosh (literally Threshing), the prohibition of extracting a desired item from an undesired one . In this class, Rabbi Isaacson discusses juicing fruit on Shabbat, and whether one can squeeze a fruit on Shabbat if the liquid is not used.

In this Torah shiur (class) on Hilchot Shabbat, Rabbi Shimon Isaacson begins the Melacha of Dosh, Threshing. This melacha can be understood through a discussion of milking a cow on Shabbat.