This educational website does a great job with it's analog and digital clock.  You can change the clock to real time.  You can roll a dice to get a random time on the clock.  You can actually change the mode and use the clock's hands to demonstrate angles and fractions.  The clock's style and color can also be changed. You can also change the style of the tick marks that go around the clock which makes it easier for students to view, when you are demonstrating different times.  

This website provides great student whiteboard activities for elapsed time.  There are two clocks that are completely changeable so that you can ask students what the elapsed time is.  I use the dice frequently because it provides completely random times.  You can hide one clock  and then give how many hours before or after that specific time and now your students have to either draw the time they calculate it to be and then unhide the clock so students can verify their calculations.  

In this science video, Veritasium does a fantastic job interviewing the public to see if they know what it actually means to be a solid, liquid or a gas.  It is fun to watch people try to remember from their schooling what the scientific answer is.  This would be a great video to show when introducing 3 of the 4 states of matter to your chemistry or physical science students.

I use this digital geoboard with my 3rd grade students when teaching shapes.  I have students do their best to create, 2d shapes like triangles, right triangles, pentagon, hexagon, octogon, kite, square, rhombus, and rectangles.  When we are done with learning the shapes, students create their own image on the geoboard.  There are many variables that students and teachers can use when creating their shapes like, rubber band color, size of geoboard, add grid, fill in each shape to count area and perimeter, and add text.  Once finished you cna click the share button to gen

In this Earth Science digital activity, students will locate specific water eroded or deposited landforms. The activity will enhance their understanding of Geo Coordinates. Students will use Google Earth and become more proficient with its use. Students will see actual satellite views of their vocabulary words instead of just memorizing the definitions. Vocabulary words that will be reinforced are Meanders, oxbow lakes, sediment, river types (old, mature, young), delta, deposition, erosion, alluvial fan, and flood plain.

In this Earth Science lab, students will design an experiment to answer the following question. Will rock weather faster or slower if it has more surface area exposed? Students will use Alka-Seltzer as their rocks. They will have to come up with a control and two other variables, They will need to list their hypothesis, step by step procedures, observations, and create a statement of conclusion. When they are finished they will understand the relationship between surface area and rate of weathering.

In this exercise, students will use a Geologic map to discover what types of rocks, faults, and ages of those rocks are. They will read about the different environments that Arizona has had over the ages. They will also get a review on words like conglomerate, intrusions, sills, igneous and sedimentary rocks.

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In this student self-guided Earth Science activity, students will read about and work their way through the different techniques used in Relative Dating.

In this Earth Science Lab, students will gain an understanding of what relative humidity and dew point are. There are four parts to the lab. The first part will help them understand the relationship between the ability to evaporate and humidity. Students will then use psychrometers to determine the humidity outside as well as inside. They will calculate the wet-bulb depression and then use the relative humidity chart to determine the percent of water in the air outside and inside the classroom.

Students will research 8 common metamorphic rocks. Marble, quartzite, hornfels, slate, phyllite, schist, gneiss, and amphibolite. Students will have a better understanding of what foliated vs. non-foliated rocks look like. They will understand what a parent rock is and review some of their mineral knowledge by researching what some of the most dominant minerals are in these particular metamorphic rocks. Finally, when they are done they will discuss with their groups some higher-order thinking questions that will drive the class discussion when the assignment is completed.