Building atoms in the classroom

 

Helium planetary model

Helium planetary model

 

Lithium: protons, neutrons and electrons

Lithium: protons, neutrons and electrons

 

Potassium

Potassium – can pull the oxygen out of paper if it has to!

 

These guys will tell you about it: periodic videos

 

How to build a trinomial cube out of lego

For those times when a binomial square is not enough The Troutbeck School shows you how to build your own trinomial cube of (a + b + c) out of lego. There is a nice long step by step guide on the school site:
http://thetroutbeckschool.com/how-to-build-a-trinomial-cub…/

 

lego trinomial cube a layer

lego trinomial cube a layer

 

lego trinomial cube dissected

lego trinomial cube dissected

 

lego trinomial cube completed

lego trinomial cube completed

Tree House Number 2: The Porch

The porch foundations were a bit more complicated than the main tree house. The porch is supported by what I may call an inverted 3D roof truss which spans between two tree stumps. Below you can see Didymus balancing on the mid point of the truss (temporarily supported at each end).

Didymus balancing on the inverted 3D truss

Didymus balancing on the inverted 3D truss

 

To make matters more interesting you can see that the last tree stump (on the right – below) was way too short.

Inverted 3D truss

Inverted 3D truss

 

The last stump was too short

The last stump was too short!

 

Thus we used an “Alpine” style cross made of  simbi (metal) by Soko. This anchored the centre of the truss firmly into the tree stump with the help of some cement. So technically the tree house still doesn’t touch the ground (yet) – it just has a steel-cement support in one tree stump.

 

Metal cross inserted into hollowed out tree stump

Metal cross inserted into hollowed out tree stump

 

Cement being added into the stump

Cement being added into the stump

 

Now a well anchored inverted 3D truss foundation

Now a well anchored inverted 3D truss foundation

 

Porch floor and steps up

Porch floor and steps up to main house

 

Porch window

Porch window

 

Looking north through the porch

Looking north through the porch

 

Working on the stairs up

Working on the stairs up

 

Working on the stairs up

 The banisters

 

Looking north again - with roof in place

Looking north again – with roof in place

 

Porch roofing structure

Porch roofing structure and lintels

 

Its taking shape now

Its taking shape now

(Just in time for the phantom rainy season –  its a drought year)

 

 

Tree House Number 2: The Roof Goes On

Roofing continues with a layer of Alububble insulation followed by the fish scale tiling.

Edmore the roofer

Edmore the roofer

 

A roll of Alububble

A roll of Alububble

 

A layer of Alububble insulation goes on first

A layer of Alububble insulation goes on first

 

Yes that is a tree sticking out through the roof

Yes that is a tree sticking out through the roof

 

Rear view with Alububble in place

Rear view with Alububble in place

 

'Chimney' with green fish scale tiling

‘Chimney’ starts with green fish scale tiling

 

Chimney frame being hauled up

Chimney frame being hauled up

 

and lowered into position

and lowered into position

 

Chimney frame in position

Chimney frame in position

 

You get the idea

You get the idea

 

Looking good

Looking good

 

Tree House Number 2: More Walls and Roof

Edmore sighting his lines for the roofing trusses – actually the rafters. Its the foundations that are inverted roofing trusses!

Edmore sighting his lines for the roof

Edmore sighting his lines for the roof

 

Sight lines where the rafters will join the tree

Sight lines where the rafters will join the tree

 

In the tree tops with spirit level!

In the tree tops with spirit level!

 

Gouging holes for the roof beams

Gouging holes for the roof beams

 

More gouging

More gouging

 

Trees were harmed in the making of this production

Trees were harmed in the making of this production

 

Walls and rafters, and trees

Walls and rafters, trees and trusses

 

Fufura (giant butterflies)

Fufura (giant butterflies)

 

Roofing slats going on the the rafters

Roofing slats going on the the rafters

 

Trusses and rafters

Trusses and rafters

 

Roofers in action

Roofers in action

 

Roofers in action

Roofers in action

 

Didymus

Didymus

 

Is that a tree in your roofing?

Is that a tree in your roofing?

 

Nice view of the construction

Nice view of the ongoing construction