Classroom Fluency Timer vs CloudLabs Converging Lens

Fully fudgeable classroom timer! Timers are arbitrary by definition, and they will go off when they go off, which may not be when you want then to go off. But you can control thiss. Use gestures to discretely add or remove time to clock while it is active. This is very useful for classroom management. This timer has two modes: Standard Timer and Fluency Timer. The Fluency Timer was specifically designed for faciltating Paul Nation's 4/3/2 fluency activity where speakers repeat their ideas under progressively shorter time constraints. - Fully customisable for both the number and length of each segment. - Also functions as a standard countdown timer. - Allows you to add or remove time from the clock while the timer is active to facilitate classroom management. - Won't go to sleep while timer is active.

This simulator recreates an optical table with a converging lens and two test objects. The goals of this lab are to experimentally find the focal length, radius of curvature, and power of the lens, as well as find the magnification of the image and determine whether or not it is inverted. During the laboratory development you will be able to observe the changes in the size of the formed image, as the distance between the object and the lens is varied.