Abstract: An electromagnetic interactive whiteboard system includes a first electronic pen (16) constructed and arranged to operate at a first frequency (F1). At least a second electronic pen (18) is constructed and arranged to operate at a second frequency (F2) that is different from the first frequency. An electromagnetic interactive whiteboard (12) has a single conductive grid (14) constructed and arranged to receive electromagnetic signals from the pens due to proximity of the pens to the grid. A circuit (30) separates the first and second frequencies into their respective X and Y component frequencies when the pens are operating simultaneously. A controller (20) receives a signal including the separated X and Y component frequencies of each of the first and second pens to detect each pen and to determine an X and Y coordinate position of each pen relative to the grid based on the X and Y component frequencies.

Abstract: A charging station (10) for wireless digitizer tablets (12) includes a housing (11), and a plurality of tablet receiving areas (20) associated with the housing. Each tablet receiving area is constructed and arranged to receive a wireless digitizer tablet for docking therein. A charging connector (24) is associated with each tablet receiving area and is constructed and arranged to be connected with an associated tablet for charging at least one battery of the associated tablet. A power cord structure (26) is electrically connected with each charging connector such that when the power cord structure is connected with a source of power, the power cord structure delivers electrical current to each charging connector substantially simultaneously.

Abstract: Communicating in an educational environment includes placing a chalkboard in a private mode that allows a user of the chalkboard to view information exclusive of others in the educational environment. Information is displayed on the chalkboard according to the private mode. The chalkboard is placed in a public mode that allows the chalkboard to control a common display, and information is controlled on the common display using the chalkboard. The common display is viewable by others in the educational environment according to the public mode.

Abstract: A communication system for communicating with students in an education environment includes a plurality of remote units, a base station that receives messages from the remote units, a processor, a memory, and a display simultaneously visible to all users of the remote units. The base station receives a response to a current question from a remote unit. The processor determines whether the current response is a valid response, and uses the display to visually indicate to a user of the remote unit whether the response is valid.

Abstract: A personal response system 10 includes a plurality of camera assemblies 12 each having a camera 16 constructed and arranged to capture an image of information 18 on material that rests on a surface below the camera. Each camera assembly includes a transmitter 21 constructed and arranged to transmit the captured image in a wireless manner. A single receiver structure 22 is constructed and arranged to receive transmitted captured images from the camera assemblies. The receiver structure is constructed and arranged to be associated with a single host computer such that the captured images can be managed at the host computer.

Abstract: A communication system for communicating with students in an education environment includes a plurality of remote units, a base station that receives messages from the remote units, a processor, a memory, and a display simultaneously visible to all users of the remote units. The base station receives a response to a current question from a remote unit. The processor determines whether the current response is a valid response, and uses the display to visually indicate to a user of the remote unit whether the response is valid.

Abstract: A communication system for communicating with students in an education environment includes a plurality of remote units, a base station that receives messages from the remote units, a processor, a memory, and a display simultaneously visible to all users of the remote units. The base station receives a response to a current question from a remote unit. The processor determines whether the current response is a valid response, and uses the display to visually indicate to a user of the remote unit whether the response is valid.