This is a first grade textbook/workbook combo but I think it is great for K-2. I got it from Noor Art. It not only talks about Prophet Muhammad(sallallahu alayhis wa salaam) but etiquette in the masjid and so on.

I also got this which I am finding to be an invaluable tool from IQRA (also through Noor Art).

Since my son will be joining us, InshaALLAH, I need all the help that I can get because he is a handful! This covers an array of topics, including emotional development, Arabic and English learning at a young age, art, math, writing, developing speech, etc.