Need to speak to small groups of kids or the whole class? Lightspeed’s Flexcat can help with a group of in-class intercoms that facilitate communications. The teacher wears a headset and each group of students has a table-top intercom that amplifies what the teacher says. The $2,850 kit includes the headset, teacher’s module, four student intercoms, a remote control for deciding which modules to connect with and a charging station. The system fosters two-way communications and each module has a 2-inch speaker for surprisingly full audio.