I’m back after two week gap, I notice lot of things happened here in two weeks.

I worked on an EBD (Education by Design) project with children in Isai Ambalam School. They had built a red mud and brick oven, but are concerned that in the rainy season the red sand get eroded by water. They want build a short wall to protect the oven from flow of the water during the rains.

Now they are in the process of cleaning and breaking and making the floor plain to raise a wall from there. It was amazing experience with children and they are eager to finish it soon.

In this week, I learned a tool called magic used for VLSI layout. I did the layout of an Invertor, NAND gate. Then I learned how to create a hierarchy and import a NAND gate layout and use it to create XOR gate by wiring using different layers of metals to avoid a short circuit.

I learned to make animation in GoAnimate website, which will be helpful to teach children.

I learned to use geogebra. And I have used geogebra to solve a linear equation.This worked for me and it was new to me.It is increasing my interest in mathematics.Now I am eager to solve many equation.Whatever equation we put according to that we will get wave form.For an example i have taken 3x+2 is a linear equation.from that diagram we can easily identify that is linear equation.It was surprised me.

I worked on students EDB.The pond which they have built before it was broken.So because of that students want to rebuild the pond.Now they are in process of adding iron rod and concrete item so that the pond won’t get break again.It was wonderful experience with them.Is very good to see like that students they were full of energy.

Goanimate it was great idea.It is like how we can make our session to be more interactive.It was fun and awesome.Because whatever we want convey to the students we can convey by making video through goanimate.It was my first experience with goanimate.I made a video about multiplication story.The below picture can tells about story of multiplication.

(I.e) there are 3 children I bought some of the chocolate.If I gave 4 chocolate to each of them how many chocolate did I give?. The answer also I have shown.The answer is 12(add there number of chocolates what they have then we will get the answer easily).

We are conducting a basic VLSI course. Around 16 participants from in and around Auroville are coming in to learn. We are only focusing on Digital layout and understanding basic concepts. So far we have covered the following topics.

Introduction to VLSI

Basic device physics

Working of a transistor

Magic layout tool

Stick diagrams

Simulating an Inverter in LT spice tool.

Laying out an Inverter

Extracting netlist

Laying out NAND gate

Building INVERTER, OR, AND and XOR using NAND gates

During the activity class in Udavi school children were working on different applications like Goanimate, MIT Appinventor, Stykz and scratch. Muralidharan anad Nirmal was working on Goanimate. Murali made a video called help others. He made an animation of a man sailing on the boat searching for treasure but then on his way he finds a man in an island asking for help then he goes and rescues him from there. Aravindh built a timer app using MIT Appinventor. Jeeva worked on scratch and programmed a game. Yuvan was working on Stykz and learnt to insert figures in it. It was interesting to see them working on their own on different activities. They were so curious to learn new things and enjoyed learning. Nirmal learnt Go animate and was animating a video to represent a geometrical concept during his math class.

Raman Young Science Innovator Award is a contest for students studying from III to X standards grouped into three. Students from IIIto IV, V to VIII and IX to X. We heard about this contest and started registering for it on 31st January. The registered students got their login credentials through their mail after 31st January. We submitted their projects on the last date on 10th February (extended to 12th February). 11 students from Udavi School chose their topics and submitted their Innovation projects. They are Abitha, Amsavalli, Hariharan, Kabilan, Punidhavel, Suriya and Vignesh from IX standard. Baranidharan from VIII and Arvindh, Pranav and Vishal from VII standard. The topics were based on their standards.

Abitha (Class IX)

Abitha chose the topic refraction. She made her project using GeoGebra. She used two mediums. Both of them are air. The incident ray and the refracted ray has the same angle. The refraction index of the second medium increases then the angle decreases.

2.Amsavalli (class IX)

She did a project on reflection using GeoGebra. The incident ray falls on the mirror and the ray gets reflected. This is the reflected ray. She showed the angles of the reflection in an animated form.

3.Hariharan (Class IX)

Hariharan chose the topic frequency. He made his project using Arduino. He used ultrasonic sensor to detect the object. When any object is placed in front of the ultra sonic sensor it makes sound. Based upon the distance of the object to the sensor, the sound will differ.

4.Kabilan (Class IX)

Kabilan made a microscope using a mobile phone and lens of laser light. He placed the object on the lense and it shows the enlarged image of it in the mobile.

5.Punidhavel (Class IX)

Punidhavel made a piano using resistors, basar and battery. He made the sa re ga ma tune in his project.

6.Suriya (Class IX)

Suriya made a pie chart using GeoGebra about the natural gases in the atmosphere.

7.Vignesh (CLass IX)

Vignesh chose the topic frequency. He measured the frequency of tuning fork with the help of microphone and oscilloscope. By using this we can also measure the heart beat frequency.

8.Bharanidharan (Class VIII)

He made an inverter using Arduino. He tested it with five watts bulb.

9.Arvindh (Class VII)

He made his project on slow combution explaining the ignition temperature.

10.Pranav (Class VII)

Pranav made a steam engine

11.Vishal (Class VII)

Vishal made a project on combution. A stove using a big tin with holes and one small tin with holes. The smaller tin was placed inside the bigger tin.

Students made their project with their full involvement and felt happy after submitting their innovation project.

How to make a concrete structure using cement, jelly and sand . Children wanted to make a beam around the pond. To make a beam they wanted to they need a iron rods. We bought the iron rods and the tools to bend the rod into a rectangular structure. First time when I made a TMT Ring it didn’t come in proper way. 5th time I got it correctly. Children were excited and they were watching me seriously. They found the patterns and how to bent the iron rod. One child from 4th standard took effort to draw the actual ring size using a on the surface where I was making the rings. Then Children started to do and they found the pattern how to bend the rings. They told the that they need to bend it 90 degree. All the children used the ring structure that the boy drew which was very useful to bend the ring at the right size.

Sooriya and Aruldeva from 9th std in Udavi wanted to learn about 3D printing. They both sat together and got an idea of printing the Olympic flag symbol with five interlaced rings. They tried to design it in Blender. Some times they had doubt and they asked to an 8^{th} grade child and learnt how to design things in Blender.

It was nice to see 8^{th} grade and 9^{th} grade children working together and learn from each other. Then they some how changed the Olympic symbol into a fidget spinner and printed it using Cura. But they had finally printed something as they wanted and learnt to use the 3D printer. They were then playing with it. This dint stop with the fidget spinner. They wanted to continue printing things and now Aruldeva is working on the 3D printer to print a top.

RYSI (Raman Young Science Innovator) When we got the circular about Raman award. Students were so excited to do many things in different ways.I have supported few of them.It was different experienced with each children. One of the student is from 9^{th} grade, he wants to measure the frequency.We have connected one micro phone with an Oscilloscope.With the help of an Oscilloscope we measured our heart beat frequency.

I learned about Density(formula). In water, if we through a stone, it will sink because the density of the stone is greater than 1. If it is in less than 1 it will float in the water. Sharani from 5^{th} grade she did density project for Raman award. I just supported her.That was nice experienced with her.

In scratch I learned to give input from the keyboard using sensing(tool). I have drawn a circle using scratch. In that program I did not give radius value I have given radius value from the keyboard.That was new for me.

About 22 principals of various schools from mind mingle had come to Auroville to visit schools in and around Auroville. They were split into two groups and one of the groups came to STEM land. They were about 10 principals. We gave a broader picture of what we do and how children learn in STEM land.

Then they went around STEM land and interacted with children. They saw the weekly puzzle, weekly plan. Children showed them how they fill their plan using the software, Hariharan solved Rubiks cube, on the other side Viknesh and kabilan were demonstrating their Makey Makey project in which they made a mouse using a rubber chapel.

They looked at the Montessori materials. At the next room children were printing a fidget spinner in 3D printer, some of them were working on Alice and scratch.

The principals were happy to see children printing 3D models and sat along with the children to learn how it works. Children showed their projects which they made in Scratch, Geogebra and Alice. Children gave the principals some cast puzzles and asked them to solve it. Some of them played games along with the children.

It was interesting to see children sharing their learnings with the principals from various states without any hierarchies. Each one of the teachers learnt something from the children and were happy to be STEM land. At the end they wrote about how they felt being in STEM land. They said STEM land is a nice learning environment with freedom. One of the principals said that she was touched with what we do and wanted to implement it by herself.

In Isai Ambalam School I was introducing multiplication as area to the 4th graders. Children were having difficulty to do two digit multiplications. So we started using graph sheet to solve multiplication. We started with single digit and then we build on it. I found that using graph sheet children could only see the area and couldn’t build on it. Then children started to use Denies block. Children who were having difficulty started with the Dines block. Children who felt confident started to use scale and measuring tape to measure the object. In STEM land children started to measure the entire object which were in rectangle and square shape. They kept the Dines block on each object that they wanted to measure. They started with a note book and ended measuring the white board. Children also understood that they need to know the length and width to find the area. Children were able to calculate and checked how many 1cm² (centimetre) cube can fit in that area. I also introduced the unit convention to the children I told cm square. One child wrote cm and drew a square on top of cm. Then I explained him that what he wrote was correct and for writing convention we write it as cm².