Free Homework & Revision Platform
Seneca Learning is a completely free homework and revision platform that applies neuroscience to make students learn 2x faster (research showing this published in the Chartered College of Teaching's IMPACT journal). It has exam-board specific GCSE courses, and from September it is expanding into KS3 and A Level. It covers all sciences (including the combined courses), maths, food nutrition & preparation, and most other GCSEs. Try it out here: https://senecalearning.com/
There is a separate teacher platform (https://app.senecalearning.com/teacher/), on which you can make classes, track the progress of students and set homework with automated marking (from September onwards).