I got a mail from our local Mathnasium saying that the trimathlon will be held in March instead of October

When you say writing component, are you looking for something more than copywork/dictation? We use FLL/WWE at home and so probably am not the best to answer this question. If you are looking for workbooks, I imagine companies like Evan Moor and Spectrum should have workbooks for writing and you should be able to see samples online (or in a teacher store/Book store). Bravewriter, IEW and a host of other writing programs have been frequently mentioned in these forums, although they might be more suited for your 2nd grader.

My initial plan was to do SM 3x a week and do BA the remaining 2 days, but my daughter loves BA that she insists on doing it every homeschooling day in addition to SM. I usually restrict her to 1 or 2 pages from the workbook, otherwise a major part of our day will get swallowed by Math. She is not a big fan of SM though...

Thank you! I felt so blank trying to apply the concepts to other books. I am looking at Teaching the Classics and also wondering if their Ready Readers help.

Yay! We are not yet into 4th grade books, but I am glad that I don't have to stretch out the existing books. I really hope 4C doesn't get delayed like 4B.