Yes, there is! First, you can search texts by Lexile. Then you can assign a text to individual students and small groups, which will help with differentiation.
When you assign a text, you will see an option to assign a text "To one or more individual students." Select this option and a drop-down menu will appear. Select the students to whom you wish to assign a particular text. You can also enable Guided Reading Mode for specific students or groups!
If you want to keep all your assignments within each class, you can also create a class-wide assignment and exempt students who are not assigned that text from the assignment report.
For more information on how to assign texts, see "How do I create an assignment?"
We do not offer one text rewritten at different Lexile levels.