Freebookcentre.net's computer science section contains links to many technical books offered free online, either as html pages or downloadable pdfs. Books are arranged by subject: Data Structures and Algorithms, Compiler Design, Object Oriented Programming, Operating Systems, Computation Theory, Artificial Intelligence, and others.

About one-third of Patriot soldiers at the Battle of Bunker Hill were African Americans. Census data also reveal that there were slaves and free Blacks living in the North in 1790 and later years. What were the experiences of African-American individuals in the North in the years between the American Revolution and the Civil War?

In this activity, students explore how trebuchets were used during the Middle Ages to launch projectiles over or through castle walls as well as how they are used today in events such as Punkin’ Chunkin’. Students work as teams of engineers and research how to design and build their own trebuchets from scratch while following a select number of constraints. They test their trebuchets, evaluate their results through several quantitative analyses, and present their results and design process to the class.

Roller coasters projects are frequently used in middle and high school physics classes to illustrate the principle of conservation of mechanical energy. Potential energy transforms to kinetic energy and vice versa, with gravity being the driving force during the entire process. Even though friction force is mentioned, it is rarely considered in the velocity calculations along the coasters’ paths. In this high school lesson, the friction force is considered in the process. Using basic calculus and the work-energy theorem for non-conservative forces, the friction along a curved path is quantified, and the cart’s velocity along this path is predicted. This activity and its associated lesson are designed for AP Calculus. Practice problems/answers, a PowerPoint® presentation and student notes are provided.

This activity was produced in conjunction with The Library of Congress and the TPS at Metropolitan State University of Denver. This activity will allow learners toinvestigate and explain how different groups of people were treated in the past, and the ways in which that treatment changed over timeidentify injustice in multiple formsidentify ways in which groups become marginalizedThis lesson leads students through several major events in the history of the Cheyenne & Arapaho tribes, and asks that they use primary source documents to describe the ways in which the treatment and perception of the tribes changed over time in southern Colorado.

Students learn about the basic properties of light and how light interacts with objects. They are introduced to the additive and subtractive color systems, and the phenomena of refraction. Students further explore the differences between the additive and subtractive color systems via predictions, observations and analysis during three demonstrations. These topics help students gain a better understanding of how light is connected to color, bringing them closer to answering an overarching engineering challenge question.

(Nota: Esta es una traducción de un recurso educativo abierto creado por el Departamento de Educación del Estado de Nueva York (NYSED) como parte del proyecto "EngageNY" en 2013. Aunque el recurso real fue traducido por personas, la siguiente descripción se tradujo del inglés original usando Google Translate para ayudar a los usuarios potenciales a decidir si se adapta a sus necesidades y puede contener errores gramaticales o lingüísticos. La descripción original en inglés también se proporciona a continuación.)

En el módulo 1 de grado 8, los estudiantes amplían su conocimiento básico de exponentes enteros positivos y prueban las leyes de los exponentes para cualquier exponente entero. A continuación, los estudiantes trabajan con números en forma de entero multiplicado por un poder de 10 para expresar cuántas veces es uno que el otro. Esto lleva a una explicación de la notación científica y el trabajo continuo que realiza operaciones en números escritos de esta forma.

Encuentre el resto de los recursos matemáticos de Engageny en https://archive.org/details/engageny-mathematics.

English Description:
In Grade 8 Module 1, students expand their basic knowledge of positive integer exponents and prove the Laws of Exponents for any integer exponent.  Next, students work with numbers in the form of an integer multiplied by a power of 10 to express how many times as much one is than the other.  This leads into an explanation of scientific notation and continued work performing operations on numbers written in this form.

Find the rest of the EngageNY Mathematics resources at https://archive.org/details/engageny-mathematics.

In Grade 8 Module 1, students expand their basic knowledge of positive integer exponents and prove the Laws of Exponents for any integer exponent.  Next, students work with numbers in the form of an integer multiplied by a power of 10 to express how many times as much one is than the other.  This leads into an explanation of scientific notation and continued work performing operations on numbers written in this form.

Find the rest of the EngageNY Mathematics resources at https://archive.org/details/engageny-mathematics.

Research shows that engaging students in self-assessment positively impacts language learning, motivation, and learner autonomy. To help World Language Educators accomplish this, the Nebraska Department of Education invited experienced world language teachers across the state to create student-friendly assessments in the form of can-do statements in the summer of 2023. This document is a student-friendly self-assessment activity for Advanced Low world language learners created based on the 2019 Nebraska World Language Standards. The language use described in all can-do statements is meant for the target language, except for the second for standard 3.1 and the first for standard 4.2. It is recommended that world language teachers engage students with this document three times in an academic year: pre-course, mid-course, and post-course. Engaging students with this self-assessment activity will help students see growth over time and hopefully attribute growth to effective learning practices. Please feel free to contact chrystal.liu@nebraska.gov for any questions or concerns.  

Students modify a provided App Inventor code to design their own diseases. This serves as the evolution step in the software/systems design process. The activity is essentially a mini design cycle in which students are challenged to design a solution to the modification, implement and test it using different population patterns The result of this process is an evolution of the original app.

Students learn about enzyme function, enzyme specificity, and the molecular basis of lactose intolerance through experiments with the enzyme lactase and analysis and discussion questions. Students engage in the scientific practices of designing and carrying out experiments and interpreting data. This activity is aligned with the Next Generation Science Standards.

This webinar will provide a practical overview of the type of information the protein database UniProt offers for enzymes and how to access it. We will introduce the new enhanced enzyme annotation based on Rhea, a comprehensive expert-curated database of biochemical reactions that uses the ChEBI ontology to describe reaction participants, their chemical structures, and chemical transformations.

In this webinar, we will show how this new feature forms the basis of a new search. Ultimately, this information will help users to integrate and analyse metabolomic data, annotate metabolic networks and models, or mine reaction data to study enzyme evolution and predict new pathways for drug production or bioremediation.

Who is this course for?
This webinar is aimed at individuals who wish to learn more about enzymes in Uniprot. No prior knowledge of bioinformatics is required, but an undergraduate level understanding of biology would be useful.

Students are initially assigned to one of four maps of the world: Seismology, Volcanology, Geochronology or Topography. They are also given a map of the world's plate boundaries and are asked to classify the boundaries based upon the data from their assigned map. Students are then assigned to a tectonic plate, such that each plate group contains at least one "expert" on each map. As a group, they must classify their plate's boundaries using data from all four maps. Recent volcanic and seismic events are discussed in the plate tectonic context. Has minimal/no quantitative component Uses geophysics to solve problems in other fields

(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)

How do volcanologists at the Hawaiian Volcano Observatory monitor volcanoes? In a jigsaw format, students first work in teams to learn one of the four volcano monitoring data sets (GPS, Tilt, Seismic and InSAR) and then move to mixed groups acting as USGS scientists at the Hawaiian Volcano Observatory to share their data set, learn from their teammates how to interpret the other data sets, and develop a forecast for an eruption of Pu'u O'o at Kilauea volcano.

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Note: Although the term GPS (Global Positioning System) is more commonly used in everyday language, it officially refers only to the USA's constellation of satellites. GNSS (Global Navigation Satellite System) is a universal term that refers to all satellite navigation systems including those from the USA (GPS), Russia (GLONASS), European Union (Galileo), China (BeiDou), and others. In this module, we use the term GPS even though, technically, some of the data may be coming from satellites in other systems.

Show more about Online Teaching suggestions
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Online-adaptable: This unit would take a bit more effort to move to online but if one is teaching synchronously it could still be done with interactive online lecture/discussions. The exercise could be modified away from the jigsaw format OR the jigsaw component can be successfully done online with some preparation. To do the exercise as a jigsaw, students will need to be arranged into two different breakout groupings as the lesson progresses.

(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)

This activity introduces students to Greenland ice-melt data derived from passive microwave remote sensing between the years 1979 and 2007. Students make a quantitative comparison between the two years using the mapping program ArcGIS. Students are provided with NASA raster images in GeoTiff form that show Greenland ice melt extent over two of the years on record (1979 ad 2007). Students then draw polygons over these raster files and calculate a change in area between the years on record. While tools exist in ArcGIS to quantify the extent of ice melt using the raster images themselves, drawing polygons is an important and often little-practiced skill in ArcGIS, and is therefore the focus of this activity. This activity can also be modified for more advanced map-makers working with raster files, who need practice using additional tools in the Arc Toolbox. However, raster calculations are not generally a skill covered in an introductory GIS course.
The activity is meant to reinforce important map-making skills (like drawing polygons and creating new geodatabases) using a data set that explores a real-world application of ArcGIS for Earth Science students. While any two (or more!) years on record can be used, 1979 and 2007 have been used to explore extremes in the data. You can learn more about the data set and the GeoTiff images here: http://nsidc.org/greenland-today/. The activity was designed for students with prior mapping skills, but can be modified for those who have little to no mapping experience (step by step instructions can be provided, upon request).

Student groups are challenged to design and construct model towers out of newspaper. They are given limited supplies including newspaper, tape and scissors, paralleling the real-world limitations faced by engineers, such as economic restrictions as to how much material can be used in a structure. Students aim to build their towers for height and stability, as well as the strength to withstand a simulated lateral "wind" load.

This activity helps students develop better understanding and stronger reasoning skills about distributions in terms of center and spread. Key words: center, spread, distribution

The focus of the course is on medical science and practice in the age of automation and the genome, both present and future.
It ncludes an analysis of the computational needs of clinical medicine, a review systems and approaches that have been used to support those needs, and an examination of new technologies.

Students access a number of sites that provide oceanographic data in real-time or near-real-time at least weekly over the course of a semester or quarter and keep a data log and a journal of changes they see in chlorophyll, SST, and upwelling related variabiles. They focus at the global scale, and in a local scale (Pacific Northwest), interpreting changes in primary production based on material being discussed in class (Spring Transition in California Current System, Indian Ocean Monsoon, Spring Bloom of North Atlantic, Polar Ocean Productivity).

(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)

The following overview is from the Smithsonian Open Access web site:
Welcome to Smithsonian Open Access, where you can download, share, and reuse millions of the Smithsonian’s images—right now, without asking. With new platforms and tools, you have easier access to more than 3 million 2D and 3D digital items from our collections—with many more to come. This includes images and data from across the Smithsonian’s 19 museums, nine research centers, libraries, archives, and the National Zoo.
...We have released these images and data into the public domain as Creative Commons Zero (CC0), meaning you can use, transform, and share our open access assets without asking permission from the Smithsonian.