Science lessons in most Welsh schools are good but assessment isn't robust enough, according to school inspectors.
Estyn also says sometimes, in primary schools, teachers pass on their science misunderstandings to pupils.
The Welsh Government welcomes the report which it says is broadly positive.
More top news
The results of a survey into how people use the Welsh language have been published, revealing some "positives" but also "challenges".
A woman from Abergele, north Wales has launched an appeal to raise funds to fly her injured mother home to Wales from war-torn Syria.
A young man from south Wales who's battled depression says there's a long way to go in tackling the stigma surrounding men's mental health.