A storage insert for a writing surface. The storage insert includes a frame and a flange. The frame forms a receptacle and the flange protrudes outwardly from a front edge of the frame. The frame is configured to fit within an opening defined by an inner edge of a writing surface and the flange is configured to retain the frame within the opening.

A storage insert for a writing surface. The storage insert includes a frame and a flange. The frame forms a receptacle and the flange protrudes outwardly from a front edge of the frame. The frame is configured to fit within an opening defined by an inner edge of a writing surface and the flange is configured to retain the frame within the opening.

A glass board projection system includes a support board having a front surface with a defined area extending a length and a width; an anti-glare projector board composed of a glass material and that is removably secured to the support board, the projector board having a thickness extending from a front surface to a back surface; an attachment device rigidly attached to and protruding from the back surface of the anti-glare projector board and configured to removably attach to the front surface of the support board; and a gap formed between the support board and the anti-glare projector board, the gap being formed by the attachment device.

A magnetic information sharing system includes a magnetic writable system having a writable outer surface, and a plurality of writable layers having magnetic receptive properties, wherein the plurality of writable layers are overlaid on the magnetic writable system and are held thereon via magnetic force, and wherein each of the plurality of writable layers has a writable outer surface. A method of displaying information includes the steps of placing a magnetic writable system on a flat surface, recording information on a writable outer surface of the magnetic writable system, overlaying at least one writable layer onto the magnetic writable system, the writable layer comprising material having magnetic receptive properties, and recording information on the writable layer.

A method of reusing a notebook provides a notebook having a synthetic-paper page. The method also provides a thermochromic ink pen which, when used to write on the synthetic paper page, leaves thermochromic ink markings. The method further provides a moisture carrier configured to have a liquid diffused therein. The moisture carrier is configured to erase the thermochromic ink markings from the synthetic-paper page by contacting the thermochromic ink markings when the moisture carrier is moist. The method then writes with thermochromic ink on at least a portion of the synthetic-paper page. Liquid is diffused in the moisture carrier, and the portion of the synthetic-paper page having the thermochromic ink is wiped with the moist moisture carrier, such that the thermochromic ink is erased from the synthetic-paper page.

A method of reusing a notebook provides a notebook having a synthetic-paper page. The method also provides a thermochromic ink pen which, when used to write on the synthetic paper page, leaves thermochromic ink markings. The method further provides a moisture carrier configured to have a liquid diffused therein. The moisture carrier is configured to erase the thermochromic ink markings from the synthetic-paper page by contacting the thermochromic ink markings when the moisture carrier is moist. The method then writes with thermochromic ink on at least a portion of the synthetic-paper page. Liquid is diffused in the moisture carrier, and the portion of the synthetic-paper page having the thermochromic ink is wiped with the moist moisture carrier, such that the thermochromic ink is erased from the synthetic-paper page.

A frame-type air purifier includes a purifier housing, a main frame and an image board. The purifier housing has a back plate and a front plate configured opposite to each other. The back plate has a wall positioner configured thereon. The front plate includes a first quick-demounting member configured thereon. The main frame has a central hollow and a second quick-demounting member configured thereon. The image board includes a baseboard and an imaging sheet configured on the baseboard, wherein the baseboard has a third quick-demounting member configured thereon. The first quick-demounting member of the purifier housing selectively assembles with the second quick-demounting member of the main frame correspondingly, or selectively assembles with the third quick-demounting member of the image board correspondingly.

A frame-type air purifier includes a purifier housing, a main frame and an image board. The purifier housing has a back plate and a front plate configured opposite to each other. The back plate has a wall positioner configured thereon. The front plate includes a first quick-demounting member configured thereon. The main frame has a central hollow and a second quick-demounting member configured thereon. The image board includes a baseboard and an imaging sheet configured on the baseboard, wherein the baseboard has a third quick-demounting member configured thereon. The first quick-demounting member of the purifier housing selectively assembles with the second quick-demounting member of the main frame correspondingly, or selectively assembles with the third quick-demounting member of the image board correspondingly.

A ballistic presentation board includes a presentation board and a ballistic layer, the ballistic layer being attached to the back of the presentation board. The ballistic presentation board provides at least National Institute of Justice Level IIA ballistic protection. The ballistic presentation board can be attached to a wheeled stand to provide a ballistic presentation board assembly which can be pushed against a doorway during an attack to protect from gunfire, etc.

A ballistic presentation board includes a presentation board and a ballistic layer, the ballistic layer being attached to the back of the presentation board. The ballistic presentation board provides at least National Institute of Justice Level IIA ballistic protection. The ballistic presentation board can be attached to a wheeled stand to provide a ballistic presentation board assembly which can be pushed against a doorway during an attack to protect from gunfire, etc.