please send me the scriptural requirements for the tithe. Give me the scriptural teaching on the third year tithe. thanks.

Please keep this confidential!!!!! I am an orthodox 25 year old with an 18 year old siter-in-law whom I really want to help. I dont want to do this the wrong way and am not sure if I can do anything at all but I thought maybe you would have an idea. My sister in law (obviously shalom bais is going to be an issue here) is 18 and wants to go to israel but is one of those people who has no direction and hasn't really done anything about it, she really expects everything to fall in her lap. I am afraid though that the one time people are going to try and teach her tough love, is the one time she needs help the most!!! She really wants to go to bar ilan for the year, which may have its positives for some but not as many as going to somewhere that will help her religious observation. She has no interest in being orthodox and has even less in learning. She is a regular teenager, who drinks and probably does drugs and is very into boys and her gashmias. My inlaws would love her to go to a seminary but she did not get into the only one she would apply to (mechalos ester - I think) which is probably for the better becasue she has friends going there. I dont think they know what to do with her and her school seems to just want her to graduate and be gone. I was very like her as a teenager, but as a boy there were yeshivas in israel that wanted to help me, I do not know what program would be good for her or how to get her to look into them, obviously trying to trick her into believing the idea was hers would be ideal becasue anything that comes from anyone else is just not going to be the right program. Everyone in her family wants her to go to israel and she is willing I just think if we can get her to agree to go to the right program it may just work. I know this is a wierd question for an email but I really dont know who else to ask, and I really cant give up on her now!!!!

1. I learned to daven from a conservative day school, now I'm frum and daven daily by myself but I'm still not sure what exactly is necessary in my morning davening please advice. 2. Arriving late to shul on shabbos or yontiv occurs naturally for people what should you do? Start as if davening just started or start where the shul is davening and finish with them? 3. I know everyone needs someone to depend on etc. in life but how do you go about finding the correct Rabbi for yourself? The one for halachic questions, kashrus questions, decision questions, shidduch questions, just questions?

I'm confused by the definitions I've read. In general, what is the difference between the Talmud and the Midrash? Thank you for your time and effort on my behalf.

can you draw lines on shabbat?