Science Course Textbooks

Hi,

I'm currently teaching a fairly new English immersion Science course at a private high school and am looking to add a textbook for next year. It should ideally be aimed at students with high beginning to low-intermediate English (Eiken 3 to 2), and focus on introducing basic concepts in biology, chemistry and physics.

Does anyone have any recommendations for textbooks that they have come across? Currently ['Gateway to Science by Tim Collins'](https://www.amazon.co.jp/Gateway-Science-Softcover-304-pp/dp/1424016215/ref=olp_product_details?_encoding=UTF8&me=) is top of my shortlist, but is a bit pricey for the school to order. Thank you.