Abstract: An example system for presenting educational activities includes a computer processor and computer memory including instructions that cause the computer processor to receive a plurality of educational activities. The instructions also cause the processor to determine a learning level for a target user. The instructions further cause the processor to filter the plurality of educational activities for the target user based on the detected learning level for the target user. The instructions also further cause the processor to rank the filtered plurality of educational activities for the target user based on a social factor. The instructions also cause the processor to present the ranked educational activities to the target user in an extended social media feed.

Abstract: A system for acquiring feedback from an audience, such as a group of participants in an educational class or a business meeting. The system includes a camera that is controlled to capture an image of the group of participants. Each participant may be provided with a set of encoded objects that both reflect responses that can be selected by the participant and the identity of the participant. These objects may be encoded with a pattern that facilitates computerized recognition in the image of the response selected by the participant and participant identifier. Based on information acquired from the image, the system can automatically, or with user input, analyze responses from the group of participants.

Abstract: A yard roller having a frame traversable over ground to be rolled by a drum rotatably mounted on the frame and arranged engaging ground over which the frame traverses. A power unit is mounted on the frame and connected to the drum for rotating the drum and moving the frame together with the drum.