This task gives students another way to practice counting and gain fluency with connecting a written number with the act of counting. This task should be introduced by the teacher and would then be a good independent center.

The most engaging way to practice counting with students is to have them count meaningful things in their lives. Since five-year-olds are very focused on themselves this is easily done by allowing them to count themselves, their friends and objects within the classroom that relate to their daily lives.

This challenging problem and brainteaser gives first graders an opportunity to compose and decompose squares.

This is an instructional task related to deepening place-value concepts. The important piece of knowledge upon which students need to draw is that 10 tens is 1 hundred.

Using solar images and date obtained from Astronomical Observatory of the University of Coimbra lets you study the sunspots and their behaviour over days.

The objective of this lesson is to gain automaticity counting to 100 and to establish the importance of multiples of ten. The final goal of this lesson is for students to be able to count by tens and articulate the term for this.

Students learn about local and planetary physical geography / geology, toponymy, planetary landing site selection and cartography. The students learn a complex process of landscape evaluation and city planning, based on the interpretation of photomaps or digital terrain models.

In this activity, students use a range of primary and secondary sources about San Francisco's Chinatown (1880s-1920) to explore what the community meant to residents and to outsiders.

This task involves solving equations with rational coefficients, and requires students to use the distributive law ("combine like terms"). The equation also provides opportunities for students to observe structure in the equation to find a quicker solution, as in the second solution presented.

This task presents a real world application of finite geometric series. The context can lead into several interesting follow-up questions and projects. Many drugs only become effective after the amount in the body builds up to a certain level. This can be modeled very well with geometric series.

Students learn about the physical force of linear momentum movement in a straight line by investigating collisions. They learn an equation that engineers use to describe momentum. Students also investigate the psychological phenomenon of momentum; they see how the "big mo" of the bandwagon effect contributes to the development of fads and manias, and how modern technology and mass media accelerate and intensify the effect.

In this lesson, students find their location on a map using Latitude and Longitudinal coordinates. They determine where they should go to be rescued and how best to get there.

In this activity, students learn about astronomical phenomena we can see in the universe and create their own music inspired by astronomical images. By performing original musical improvisations, students enhance their knowledge of what astronomical phenomena are represented in images and experiment with creative ways of representing these using music. This activity engages students in first hand exploration of music and astronomy connections.

You are preparing your family’s emergency kits in case there is a need to leave your home quickly, or stay in your home without electricity or water. You need to be able to create an emergency supply kit that includes a lightweight water filtration device that is low cost. This will provide you with clean water regardless of your water source.

In this project, you will gain knowledge of natural disaster preparedness through the Red Cross Pillowcase project. You will research and experiment with the water cycle to learn how water is naturally filtered. You will then design and build a water filtration device that could filter water in an emergency situation.

Students put their STEAM knowledge and skills to the test by creating indoor light fixture “clouds” that mimic current weather conditions or provide other colorful lighting schemes they program and control with smartphones. Groups fabricate the clouds from paper lanterns and pillow stuffing, adding LEDs to enable the simulation of different lighting conditions. They code the controls and connect the clouds to smart devices and the Internet cloud to bring their floating clouds to life as they change color based on the weather outside.

In this activity students create a "magic lantern show," or presentation that illustrates how African American defined freedom for themselves after emancipation and the challenges and threats they faced. Students use primary sources from the Reconstruction period. This activity can accompany a viewing of the filmDr. Toer's Amazing Magic Lantern Show: A Different View of Emancipation.

In this activity students examine documents from the period of the First Great Migration of African Americans to the North. As they look at the documents, they take notes to build a character of a migrant. Then they create a scrapbook that shows their characters' personal journeys and experiences during the Great Migration. This activity can be part of a unit that includes the film Up South: African-American Migration in the Era of the Great War. Students will need art supplies such as construction paper, tape or glue, scissors, and markers to make the scrapbooks.

In this activity, students construct their own pinhole camera to observe the behavior of light.

Students learn about the role engineers and mathematicians play in developing the perfect bungee cord length by simulating and experimenting with bungee jumping using washers and rubber bands. Working as if they are engineers for a (hypothetical) amusement park, students are challenged to develop a show-stopping bungee jumping ride that is safe. To do this, they must find the maximum length of the bungee cord that permits jumpers (such as brave Washy!) to get as close to the ground as possible without going "splat"! This requires them to learn about force and displacement and run an experiment. Student teams collect and plot displacement data and calculate the slope, linear equation of the line of best fit and spring constant using Hooke's law. Students make hypotheses, interpret scatter plots looking for correlations, and consider possible sources of error. An activity worksheet, pre/post quizzes and a PowerPoint® presentation are included.

In this activity students learn about the people and places, and the social rules that governed them, in San Francisco's Chinatown in the 1800s. Students develop a character based on the real people who lived in Chinatown, and then create a walking tour of what life was really like in "their" neighborhood. Students analyze photographs and read short background texts to gather information for their tours.