Understanding the concept of "הפסד" (paying for losses).
(Squeezing materials.) practical applications in conjunction with using a sponge with a handle or without a handle;
Introduction to the Concept of עובדא דחול (Uvda d'Chol) in Relation to the Melacha of M'AMER;
Bringing a Raincoat to Shul for After Maariv in Case It Rains;