Research findings concerning student participation in secondary career and technical education (CTE) have shown important differences that relate to the unit of analysis and the type of measures used. Those differences hide the complexity of CTE, depict an inadequate portrayal of students' participation in CTE, and hinder the possibility of having…

Several properties of Earth's magnetic field (field vectors, time dependence) are measured in various locations using a smartphone/tablet magnetic sensor. To enable a proper use of the magnetic sensor as a classroom tool, the exact location of the sensor in the device and its resolution must be identified in a first step. Then, students may…

Measuring permeability in a high school physics course has long been a hard task. However, with the advent of using smartphones in the classroom, it is not only possible but even easily done. This paper offers detailed instructions on how to measure permeability using a smartphone's magnetometer, starting with experimentally discovering the…

Teachers are masters of content and of creating connections (e.g., students-content, students-students, teacher-students, teacher-parents). Both impact one's ability to create and sustain brave and productive learning environments. Teachers connect students to the content, and to each other. At the top of the list of important connections are…

This article describes a grant project that generated a technical guide for PK-12 educators who are utilizing social and emotional learning (SEL) assessments for educational improvement purposes. The guide was developed over a two-year period with funding from the Spencer Foundation. The result was the collective contribution of a widely…

Students are introduced to the term wavelength in optics at school level. In this paper, we present an inexpensive and simple method to measure the wavelength of the light of a light emitting diode using a light depending resistor. This experimental set-up is developed at Science Laboratory, Nehru Planetarium (Mumbai), India. It is useful as an…

This article describes an activity appropriate for middle or high school physics or physical science students. Rather than giving the answer to the question "How does a milliliter compare to a cubic centimeter?" the students develop a procedure for measuring volume by calculation and by displacement of water. Students share the data and…

Here, we propose the use of magnetic levitation (MagLev) device, as a simple, cheap, and portable experimental technique to measure the density of diamagnetic materials in laboratory settings. We highlight the basics of a standard MagLev system for measuring the density of unknown diamagnetic materials/objects using permanent magnets, paramagnetic…

An easily constructed and inexpensive polarimeter with an optical rotation angle resolution of about 0.5° is presented. It is made from small pieces of polarizing film, 2 LEDs, a protractor, and a few wires, all held in place with plastic interlocking toy bricks, such as Lego bricks. The instrument was used to demonstrate the optical rotation of…

Many teachers of intermediate algebra or precalculus use an activity where balls are dropped from known heights and the heights of the bounces are recorded. The "bounce height" will be a roughly constant fraction of the "drop height." Then one can plot each bounce height against its bounce number, an exponential function can…

In this work, we propose an interesting combination of the Atwood machine and Galileo's inclined plane to study quantitatively kinematics with a smartphone and the phyphox app. For this purpose, we use the optical stopwatch function, based on the photosensor of the smartphone. The choice of phyphox app has some advantages for presenting the…

In this paper, we present a novel dynamical approach to teach circular motion. According to the principle of inertia, objects without external influences move in a uniform and straight way. With a kick, one can turn the motion towards one side. By successively continuing these turns, a complete circle can be reached. With the help of standard…

The Texas Education Agency (TEA) prepares an annual report on graduates and dropouts in Texas public secondary schools. This report includes state summaries of the annual dropout rate, longitudinal graduation and dropout rates, and state attrition rates. In addition to statewide statistics, the report provides historical information about dropout…

A simple and low-cost, DIY-type, Arduino-driven experiment is presented for the study of friction and measurement of the friction coefficient, using a conductive rubber cord as a force sensor. It is proposed for high-school or college/university-level students. We strongly believe that it is worthwhile planning, designing and performing Arduino…

In recent years, nanotechnology has been one of the major subjects of scientific and technological research. Currently, several applications of nanotechnologies are already available on the market. Particularly relevant are the fields of new materials and sensors, which have excellent potential future applications in the biomedical field. This…