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Cogitive load theory explains why explicit guidance from teachers is more effective in teaching students new content and skills than letting them discover these for themselves. from shutterstock.com

I had an idea in the 1980s and to my surprise, it changed education around the world

There are two types of knowledge – we’ve evolved to acquire the first naturally; we need schools for the second. Cognitive load theory explains how to teach knowledge we don’t automatically get.
Morrison government assistant minister Luke Howarth argues that finding jobs for people in social housing will help free up dwellings for other people on the waiting list. Mick Tsikas/AAP

As simple as finding a job? Getting people out of social housing is much more complex than that

Helping tenants find work supposedly creates a pathway into private rental housing, freeing up social housing for others. Private rental costs and the situations of many tenants make that unrealistic.
Marianne Ihlen: she remains stuck in the role of the beautiful ingénue, the part-time lover, in Nick Broomfield’s documentary. Copyright Nick Broomfield

Marianne & Leonard: a new film tells us little about the woman fixed in the role of musician’s muse

Nick Broomfield’s latest documentary explores the romance between Leonard Cohen and Marianne Ihlen. But the film fails to confront the harder truths of the license taken by, and conceded to, creative men.
A successful pregnancy if you have diabetes comes down to planning and making sure you have the right health-care team behind you. from www.shutterstock.com

Diabetes and pregnancy can be a tricky (but achievable) mix: 6 things to think about if you want a baby and 1 if you don’t

Women with diabetes are at high risk of pregnancy complications. But there is a lot women can do to have a healthy pregnancy and a healthy baby.
One of this year’s most refreshing developments was the youth-led action on climate change. AAP Image/Dan Peled

5 human rights issues that defined 2019

From mass climate change movements to cultural genocide of Uighurs in China, here are some of the headline human rights moments that captured Australia’s attention.
Although yellow fever does not currently exist in Australia, the species Aedes aegypti - which can transmit the disease - is found widely across northern Queensland. The virus remains a global health concern, but citizen scientists could help prevent its spread. Simon Kutcher/flickr

As heat strikes, here’s one way to help fight disease-carrying and nuisance mosquitoes

Nuisance-biting and mosquito-borne disease are ongoing concerns for health authorities. But an effective citizen science program is now showing how all of us can help beat the bite of mozzies.
Many developed countries already have significant waste-to-energy operations and therefore less material going to landfill.

Climate explained: seven reasons to be wary of waste-to-energy proposals

Burning non-recyclable waste to generate energy sounds like a great idea – but incineration plants need an ongoing waste stream to be viable, which perpetuates the make-use-dispose mentality.
Olafur Eliasson, Denmark, b.1967 Riverbed 2014 (detail) Site specific installation. Pictured: The Louisiana Museum of Modern Art, Humlebæk, DenmarkCourtesy of the artist; neugerriemschneider, Berlin; Tanya Bonakdar Gallery, New York / Los AngelesPhotograph: Iwan Baan.

In our time of climate crisis, the exhibition Water is a subtly crafted plea

Water can give and water can take. Without it, however, we are nothing. A new exhibition presents a nuanced and gentle provocation as we grapple with drought and climate change.
Demonstrations against freeway construction in Melbourne included a street barricade erected in protest at the F19 extension of the Eastern Freeway. Barricade! – the resident fight against the F19

We’re still fighting city freeways after half a century

Public protests eventually forced the scrapping of some proposed freeways in 1973. Today, we have another round of projects and people are protesting again, with good reason. Government should listen.
The volcanic alert level on Whakaari/White Island remains at three, one rung higher than it was when the eruption took place. AAP/GNS Science

Why were tourists allowed on White Island?

Visiting an active volcano involves risk. Hazard monitoring systems can issue warnings but in the case of the privately-owned White Island, the decision to take a tour falls to tourism operators.
From red, to blue, to purple, to yellow and even green – why do our bruises change colour? From shutterstock.com

Curious Kids: why do we get bruises?

When you hurt yourself, tiny blood vessels can break under the skin. The blood that oozes out is what gives a bruise its colour.
Over the coming months, koalas will depend on wildlife hospitals to recover from the effects of unprecedented bushfires. Lachlan G. Howell

To save koalas from fire, we need to start putting their genetic material on ice

Unprecedented fires are devastating koalas along Australia’s east coast. These sudden drops in population put the survivors at risk of inbreeding.