The James Webb Space Telescope Mission

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figure

Effects of delayed time-out on problem behavior of preschool children

Time-out is a common negative punishment procedure in home and school settings. Although prior studies have shown time-out is effective, more research is needed on its effects when implementation is imperfect. We evaluated delays to time-out with 4 preschool children who engaged in some combination of aggression, property destruction, and rule breaking. Target behavior decreased for all subjects exposed to delayed time-out, with 3 of 4 subjects displaying low levels of target behavior even when time-out was delayed by 90-120 s. These data suggest delayed time-out might be effective in situations in which a caregiver or teacher cannot implement time-out immediately

Launching a Competitive Robotics Team for Physically Active Youth

Physically Active Youth (PAY), an afterschool program in Katutura, Namibia, supports underserved youth and aims to teach them 21st-century skills. We developed the infrastructure of a robotics team for PAY and helped them compete in a virtual robotics competition. Our final product is a 34-person robotics team that will compete in the Live Remote Tournament through the Robotics Education and Competition Foundation, thereby bringing learning and fun to Namibian youth

AN ASSESSMENT OF THE EFFICIENCY OF AND CHILD PREFERENCE FOR FORWARD AND BACKWARD CHAINING

Comparative studies of forward and backward chaining have led some to suggest that sensitivity to each teaching procedure may be idiosyncratic across learners and tasks. The purposes of the current study were threefold. First, we assessed differential sensitivity to each chaining procedure within children when presented with multiple learning tasks of similar content but different complexity. Second, we evaluated whether differential sensitivity to a chaining procedure during a brief task predicted differential sensitivity during the teaching of longer tasks. Third, we directly assessed children's preferences for each teaching procedure via a concurrent-chains preference assessment. Learners acquired all target skills introduced under both chaining conditions, but individual children did not consistently learn more efficiently with either procedure. Short-duration tasks were not predictive of performance in tasks of longer duration. Both chaining procedures were preferred over a baseline condition without prompting, but participants did not demonstrate a preference for either procedure