1) Ch. 25, v. 3: "Zohov voCHESEF u'n'choshes" - Rashi says that although all other materials mentioned came as a voluntary donation, the silver that was used to create the base sockets for the wall beams was obligatory and was a set amount for each person (35:25,26). He ends by saying that silver donations were used for making vessels of service. The Sifsei Chachomim says that Rashi added this comment so that we can say that there was silver given as a voluntary donation.
The Rambam in Sefer Hamitzvos #20 and #33 says that there is a mitzvoh to donate materials for vessels of gold, silver, etc., not only for the items mentioned in this parsha but also for OTHER VESSELS, "v'zulosom." To what does this refer?
2) Ch. 25, v. 10: "V’ossu arone" - Why was there no Holy Ark in the second Beis Hamikdosh. Even though the original orone and its contents were sequestered, why not build an orone as is required for the Mikdosh even though there will be no "luchos" inside?
3) Ch. 25, v. 15: "B'tabose ho'oronee yi'h'yu habadim lo yosuru mi'menu" - The gemara Yoma 72a says that we derive from our verse that if one removes the poles from the Holy Ark he has transgressed a negative precept and is lashed. This is mentioned in the Rambam hilchos klei hamikdosh 2:13. If one has transgressed this prohibition is it a one time sin or is it ongoing until the poles are back in place?
4) Ch. 25, v. 21: "V'nosato es hakaporres ...... v'el ho'orone ti'tein es ho'eidus" - The Ibn Ezra says that this means "Place the lid onto the Holy Ark AFTER you have fulfilled 'v'el ho'orone ti'tein.'" Rashi says that this has already been taught in verse 16. Our verse teaches that it is not permitted to place the lid onto the orone before placing the "luchos" into the orone first. What need is there for this command? It is physically impossible to first place the lid on top and then put in the "luchos."
5) Ch. 26. v. 26, 28: "V'ossiso v'richim ...... chamishoh, V'habriach hatichon ...... min hakotzeh el hakotzeh" – What were these five poles and where were they placed? How does your answer/s impact on understanding, “V'habriach hatichon ...... min hakotzeh el hakotzeh?"