SMART Response XE includes a receiver, remotes and software. The system is available in 24-, 32- or 40-unit packages, and is compatible with both Microsoft® Windows® and Mac operating systems. SMART Response XE has a full QWERTY keyboard enabling students to respond to questions using open-ended answers (up to 140 characters). The remotes allow students to input mathematical equations and scientific functions, such as quadratic equations, giving you the ability to cover more advanced content. With the intelligent grading feature, you can also choose the range of acceptable answers for a question, allowing for multiple representations of the correct answer.