This is one of my favorite sites. I think I have downloaded everything they have and am always going back to see if they have anything new. Download entire theme units in .pdf . You could almost teach with this site alone. You will have to add your Christian influence, though.
Lots of science and math info with some spanish vocabulary thrown in. Click on Products. Search the product catalog as if you were shopping. Click on the pdf file to download. They give the prices if you wish to order instead of download and copy but they are available online. Integrating Mathematics, Science, and Language (Paso Partners): An Instructional Program Vol. I (Grades K-1) or Integrating Mathematics, Science, and Language (Paso Partners): An Instructional Program Vol. Ii (Grades 2-3) is what you are looking for. They have lessons on many subjects and it is worth this "go seek" to download the lessons.