We have a subscription to Britannica so that students have access to easy-to-find, high-quality reference material from school or home.
This should take them directly to the levels page where they select the level of information they need based on their reading ability. This link only works while at school.
The link above only works while the students are at school. From home, students can access Britannica through Simon. The link for Britannica is located at the bottom of the School Links box on the left-hand side of the page under the Library heading (highlighted below).